South Australia fuel prices, September quarter 2026

Name: South Australia fuel prices, September quarter 2026
Creator: FuelRadar Australia
License: https://fuelradar.com.au/terms-and-conditions

Prices from 1 July to 30 September 2026Updated 20 days ago

South Australia U91 average

203.2c/L

+22.3 c/L on the partial June quarter 2026

Adelaide U91: 197.5c/L
Rest of South Australia U91: 207.9c/L
Diesel average: 243.7c/L

Adelaide month by month, what makes up a litre, margins, the price cycle, excise, the other capitals, and every regional town we could rank.

Comparison period: 13 April 2026 to 30 June 2026. This covers part of the calendar period. The change compares the available days, not two full calendar periods. Station coverage can also change.

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Report highlights

Quote these with the credit: Source: FuelRadar Australia, South Australia fuel prices, September quarter 2026, fuelradar.com.au/fuel-price-reports/sa/2026-q3

Adelaide reported prices averaged 197.5 c/L for U91 in the September quarter 2026, up 26.4 c/L on the partial June quarter 2026.
Crafers–Bridgewater was the cheapest town in Adelaide – Central and Hills for U91 in the September quarter 2026 at 199.0 c/L, 1.5 c/L above Adelaide.
In the September quarter 2026, the day of the week made little difference to U91 prices in Adelaide: the cheapest and dearest days were 0.6 c/L apart on average.
Filling a 60-litre tank with U91 in Barmera rather than in Nullarbor (rural) saved $56.04 on average in the September quarter 2026.
Independent service stations in South Australia averaged 1.2 c/L more than the major brands for U91 in the September quarter 2026, and 3.3 c/L less in Adelaide.
Diesel cost 36.4 c/L more than U91 in Adelaide in the September quarter 2026, down from 50.1 c/L in the partial June quarter 2026.
Barmera was South Australia’s cheapest town for U91 in the September quarter 2026 at 195.0 c/L, 2.5 c/L below Adelaide.
Adelaide was the cheapest of the 8 capital cities for U91 in the September quarter 2026 at 197.5 c/L.

Key points

Written from FuelRadar’s figures for this period and checked against them.

Adelaide was the cheapest of the 8 capital cities for U91, averaging 197.5 c/L over the September quarter 2026.
Adelaide was also the cheapest of the 8 capital cities for diesel, averaging 233.9 c/L.
Wholesale unleaded reached 192.6 c/L, the highest on record since AIP's series began in March quarter 2004 (nominal prices).
Wholesale diesel averaged 229.9 c/L, which is the highest on record since AIP's series began in March quarter 2004 (nominal prices).
In Adelaide, U91 prices followed wholesale costs and excise rather than a regular price cycle.
Regional drivers paid an average of 207.9 c/L for U91, which was 10.4 c/L more than the capital.
Barmera was the cheapest town in the state for U91, averaging 195 c/L across its 3 stations.
Nullarbor (rural) was the dearest town for U91, averaging 288.4 c/L at its 2 stations.
Adelaide U91 reached 234.3 c/L on 22 September 2026, setting a new high since our records began on 13 April 2026.
Diesel cost 36.4 c/L more than U91 in Adelaide during the period.
Since the financial year began on 1 July 2026, Adelaide U91 rose 74.5 c/L to reach 232.7 c/L on 30 September 2026.
Since our records began on 13 April 2026, the state average for U91 was 193.2 c/L.

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Every fuel in South Australia

U91 reported prices in Adelaide averaged 197.5 c/L in the September quarter 2026, up 26.4 c/L on the partial June quarter 2026 (from 13 April, when this station-price series starts). Across South Australia, U91 averaged 203.2 c/L, up 22.3 c/L on the partial June quarter 2026. Diesel reported prices in Adelaide averaged 233.9 c/L in the September quarter 2026, up 12.7 c/L on the partial June quarter 2026. Across South Australia, diesel averaged 243.7 c/L, up 10.0 c/L on the partial June quarter 2026. The other fuels averaged E10 192.0 c/L, P95 217.5 c/L, P98 226.2 c/L and LPG 114.8 c/L.

Source: FuelRadar (fuelradar.com.au)

Cents a litre. Change is on the partial June quarter 2026, which starts when our full price history does. Difference is the rest of the state against Adelaide.

Table viewwith the state average, change and stations

Average price by fuel, September quarter 2026
Fuel	South Australia	Change	Adelaide	Rest of state	Difference	Stations
Unleaded 91	203.2	+22.3	197.5	207.9	+10.4	630
Diesel	243.7	+10.0	233.9	245.9	+12.0	389
E10	192.0	+23.6	190.7	194.5	+3.8	48
Premium 95	217.5	+25.1	214.4	223.5	+9.1	358
Premium 98	226.2	+23.1	222.9	229.6	+6.7	548
LPG	114.8	+5.9	106.3	127.8	+21.5	134

What makes up a litre in Adelaide

Of the 197.5 c/L U91 average in Adelaide, crude oil was 86.0 c/L, wholesale 41.5 c/L, excise 47.6 c/L, GST 18.0 c/L and the retail difference 4.4 c/L. Of the 233.9 c/L diesel average in Adelaide, crude oil was 86.0 c/L, wholesale 75.4 c/L, excise 47.6 c/L, GST 21.3 c/L and the retail difference 3.6 c/L. Premium 95 has no terminal gate price of its own, so its breakdown uses the unleaded price and its premium sits in the retail difference. Our retail records begin on 13 April 2026, so earlier periods show the wholesale side only.

What makes up a litre of Unleaded 91

Loading chart…

Source: FuelRadar (fuelradar.com.au)

How we worked this out

A benchmark illustration using differently weighted period averages, not a matched purchase basket or measured retailer costs. See the same-date retail/TGP comparison separately.

Wholesale is the terminal gate price without GST and excise, less crude oil. GST is one eleventh of the retail price. The retail difference is what is left: the retailer’s costs and margin, without its GST. Bands are rounded so they add up to the retail price.

Retail: FuelRadar station-day averages for Adelaide. Our retail records begin on 13 April 2026, so a period before then has the wholesale side only, and “dearest” and “cheapest” compare the periods since our records began.

Terminal gate price: AIP, Adelaide terminal, carried over weekends. Crude oil: Brent spot (US EIA, via FRED) in Australian dollars, at 158.987 litres a barrel. Excise: ATO, averaged over the period’s days.

Every period (3 rows)

What makes up a litre of Unleaded 91, c/L
Period	Crude oil (Brent, A$)	Wholesale: refining, shipping, terminal	Excise	GST	Retail difference	Retail price	Terminal gate price
September quarter 2026	86.0	41.5	47.6	18.0	4.4	197.5	192.6
June quarter 2026 (part)	88.8	46.3	20.6	15.6	−0.2	171.1	171.3
2025 averageWholesale side only	67.5	29.6	51.1	—	—	—	163.0

Month by month, U91

Adelaide's daily U91 average went from 158.2 c/L on 1 July to 232.7 c/L on 30 September, and diesel from 178.5 c/L to 288.5 c/L. The highest daily average in Adelaide was 234.3 c/L for U91 on 22 September and 290.2 c/L for diesel on 24 September. Adelaide's U91 average was 172.1 c/L in July, 202.1 c/L in August and 218.8 c/L in September. Adelaide's diesel average was 200.4 c/L in July, 240.8 c/L in August and 269.2 c/L in September.

U91 average by month, September quarter 2026
Area	Jul	Aug	Sep	Quarter
South Australia	178.7	207.3	224.3	203.2
Adelaide	172.1	202.1	218.8	197.5
Rest of South Australia	184.1	211.5	228.8	207.9
Adelaide NorthArea	171.7	200.9	217.7	196.5
Adelaide WestArea	171.5	202.6	218.7	197.5
Adelaide SouthArea	172.4	202.2	219.0	197.6
Adelaide – Central and HillsArea	173.7	204.0	221.1	199.3

Cents a litre. Each month is the station-day average of the days it has in the period. An area’s months count the same stations as its quarter.

Month by month, diesel

Show diesel month by month

Diesel average by month, September quarter 2026
Area	Jul	Aug	Sep	Quarter
South Australia	208.5	251.1	273.9	243.7
Adelaide	200.4	240.8	269.2	233.9
Rest of South Australia	210.5	253.3	274.9	245.9
Adelaide – Central and HillsArea	197.5	234.2	267.9	226.9
Adelaide SouthArea	197.6	234.5	267.7	227.4
Adelaide NorthArea	200.6	240.1	268.7	234.1
Adelaide WestArea	202.2	245.0	270.3	237.6

Cents a litre. Each month is the station-day average of the days it has in the period. An area’s months count the same stations as its quarter.

Retail and wholesale on the same days, U91

Adelaide retail prices compared with the Adelaide terminal. This is not the delivered wholesale cost at individual stations.

Adelaide retail prices compared with the Adelaide terminal. This is not the delivered wholesale cost at individual stations.
Period	Days used / window	Retail daily mean	TGP, same days	Gross spread
September quarter 20261 Jul to 30 Sept 2026; 26 carried TGP days. Gaps may occur within this range.	92 / 92	197.4	192.6	4.9
June quarter 202613 Apr to 30 Jun 2026; 22 carried TGP days. Gaps may occur within this range.	79 / 79	171.8	171.3	0.4

Each common date counts once. Retail is the mean of the saved daily capital averages, not the station-day-weighted headline mean. TGP uses the same dates and carries the last published value for at most six subsequent calendar days. Retail prices can already include carried station prices. Means and spreads are rounded separately. The gross spread is not profit or a causal explanation. Retail carry limit: 30 days. Unmatched dates are excluded; common days are not a station or sales coverage percentage.

Retail and wholesale on the same days, Diesel

Adelaide retail prices compared with the Adelaide terminal. This is not the delivered wholesale cost at individual stations.

Show Diesel comparison

Adelaide retail prices compared with the Adelaide terminal. This is not the delivered wholesale cost at individual stations.
Period	Days used / window	Retail daily mean	TGP, same days	Gross spread
September quarter 20261 Jul to 30 Sept 2026; 26 carried TGP days. Gaps may occur within this range.	92 / 92	236.6	229.9	6.6
June quarter 202613 Apr to 30 Jun 2026; 22 carried TGP days. Gaps may occur within this range.	79 / 79	224.0	208.1	15.9

Worked out the same way as the table above.

Market trends this year

The Adelaide terminal gate price averaged 192.6 c/L for unleaded and 229.9 c/L for diesel, up 21.3 c/L and up 21.8 c/L on the partial June quarter 2026. Brent crude averaged US$96.3 a barrel, or 86.0 c/L in Australian dollars, with the Australian dollar at an average of 70.62 US cents.

Retail, terminal gate and crude oil prices this year

Loading chart…

Source: FuelRadar (fuelradar.com.au)

How we worked this out

Retail: FuelRadar daily averages for Adelaide, from 13 April 2026 when our records begin.

Terminal gate prices (dashed): AIP, Adelaide terminal, weekdays. Brent crude: US EIA spot price via FRED, converted at each day’s exchange rate and 158.987 litres a barrel.

Daily figures (243 rows)

Retail, terminal gate and crude oil prices this year (c/L), 1 Jan to 30 Sept
Date	U91, Adelaide	Diesel, Adelaide	Unleaded terminal gate price	Diesel terminal gate price	Brent crude, A$ c/L
30 Sept	232.7	288.5	229.1	263.1	104.9
29 Sept	233.0	288.7	228.6	264.1	102.7
28 Sept	233.1	288.6	229.3	265.1	107.5
27 Sept	233.2	288.6	—	—	—
26 Sept	233.6	288.7	—	—	—
25 Sept	233.6	289.4	229.5	267.4	103.8
24 Sept	234.2	290.2	230.2	270.6	108.4
23 Sept	234.2	289.3	230.3	273.9	105.0
22 Sept	234.3	288.9	229.1	274.9	101.8
21 Sept	231.7	283.2	228.0	274.2	102.6
20 Sept	230.6	281.7	—	—	—
19 Sept	230.0	281.2	—	—	—
18 Sept	229.0	280.0	224.8	269.6	105.8
17 Sept	224.5	273.7	221.7	263.8	107.1
16 Sept	219.1	268.0	218.8	258.7	112.7
15 Sept	217.1	266.7	214.1	252.2	115.4
14 Sept	213.6	263.0	211.9	249.5	106.8
13 Sept	208.5	257.0	—	—	—
12 Sept	208.5	256.5	—	—	—
11 Sept	208.1	255.8	210.1	248.7	103.5
10 Sept	206.1	253.7	207.9	247.5	106.1
9 Sept	205.7	253.1	205.3	245.5	95.4
8 Sept	205.4	252.4	202.8	242.8	92.5
7 Sept	205.1	251.6	201.1	240.7	—
6 Sept	204.3	250.7	—	—	—
5 Sept	204.2	250.6	—	—	—
4 Sept	203.1	249.9	198.7	237.4	89.2
3 Sept	202.5	248.4	196.6	235.0	87.8
2 Sept	201.8	247.4	195.5	234.4	85.6
1 Sept	201.8	247.4	194.8	235.9	84.3
31 Aug	201.9	247.5	195.3	238.5	—
30 Aug	202.2	247.7	—	—	—
29 Aug	202.2	248.1	—	—	—
28 Aug	202.2	248.0	195.5	239.7	78.8
27 Aug	202.9	248.2	196.5	243.1	78.8
26 Aug	203.3	248.5	196.6	244.1	77.0
25 Aug	203.4	249.4	196.4	243.7	77.5
24 Aug	203.6	249.1	196.1	243.4	81.5
23 Aug	203.9	248.1	—	—	—
22 Aug	203.4	247.9	—	—	—
21 Aug	203.3	247.9	195.4	242.5	84.9
20 Aug	201.8	244.6	194.7	241.1	83.0
19 Aug	200.9	243.6	194.2	239.6	81.6
18 Aug	199.7	243.0	193.4	237.8	84.5
17 Aug	199.1	241.3	192.8	236.5	81.7
16 Aug	198.1	240.3	—	—	—
15 Aug	197.6	239.5	—	—	—
14 Aug	197.0	238.2	191.1	233.9	81.6
13 Aug	197.3	234.2	189.8	231.6	82.0
12 Aug	198.8	232.2	189.8	230.6	82.3
11 Aug	200.5	232.9	191.0	232.5	83.1
10 Aug	203.9	236.4	192.8	234.2	82.6
9 Aug	206.6	238.1	—	—	—
8 Aug	207.5	238.5	—	—	—
7 Aug	208.0	238.9	196.5	238.3	78.0
6 Aug	209.0	239.6	198.4	241.0	80.2
5 Aug	208.0	238.6	198.7	242.4	77.3
4 Aug	205.9	236.8	198.2	240.9	77.3
3 Aug	201.2	233.6	203.5	245.8	79.9
2 Aug	196.3	229.8	—	—	—
1 Aug	196.1	229.3	—	—	—
31 July	194.4	227.7	183.8	224.4	86.8
30 July	193.6	227.3	184.2	224.5	82.3
29 July	192.5	226.0	183.8	223.9	83.5
28 July	192.0	225.7	183.0	222.5	77.0
27 July	189.4	223.8	180.8	219.7	82.6
26 July	187.1	219.9	—	—	—
25 July	185.3	219.0	—	—	—
24 July	182.2	216.6	177.6	215.9	90.2
23 July	179.7	214.8	174.5	212.2	95.0
22 July	176.5	211.6	173.2	211.1	84.6
21 July	174.1	208.0	170.2	207.0	84.2
20 July	171.3	205.3	168.5	203.7	78.1
19 July	169.3	202.6	—	—	—
18 July	168.9	201.5	—	—	—
17 July	167.6	199.5	166.5	200.7	76.5
16 July	165.4	196.4	164.2	195.3	72.9
15 July	163.8	192.6	161.7	188.6	74.7
14 July	163.2	189.5	160.3	185.3	75.5
13 July	163.3	187.9	160.3	184.3	74.0
12 July	163.1	186.5	—	—	—
11 July	163.1	185.6	—	—	—
10 July	162.9	184.9	160.6	182.8	67.2
9 July	162.6	184.0	161.9	182.0	67.4
8 July	162.3	184.1	162.8	181.4	69.6
7 July	163.2	184.5	163.8	180.8	65.1
6 July	164.2	185.7	164.2	180.2	63.0
5 July	165.5	186.0	—	—	—
4 July	165.5	186.3	—	—	—
3 July	165.1	186.2	163.7	178.5	—
2 July	160.7	182.2	163.1	176.6	62.2
1 July	158.2	178.5	162.3	174.9	63.1
30 June	154.6	175.0	146.8	159.7	64.1
29 June	148.7	171.0	146.8	159.2	65.4
28 June	148.6	171.0	—	—	—
27 June	148.5	172.3	—	—	—
26 June	148.9	174.0	147.8	159.7	63.9
25 June	149.8	177.6	148.3	160.2	67.0
24 June	150.5	179.2	148.5	161.3	65.8
23 June	151.3	181.2	150.6	165.4	68.7
22 June	152.4	183.4	151.3	166.7	68.7
21 June	153.6	185.7	—	—	—
20 June	154.3	186.4	—	—	—
19 June	155.0	187.7	153.5	170.5	—
18 June	156.4	190.7	156.7	176.9	71.1
17 June	157.1	194.0	159.1	181.7	71.4
16 June	158.0	196.0	161.4	187.5	71.5
15 June	158.5	198.2	161.2	189.2	74.9
14 June	158.2	199.5	—	—	—
13 June	158.4	199.9	—	—	—
12 June	158.5	199.9	160.5	190.9	79.1
11 June	158.4	200.0	159.9	192.5	83.5
10 June	158.4	200.2	158.9	192.5	85.7
9 June	158.6	200.7	158.6	192.1	84.3
8 June	159.1	201.1	158.7	191.5	86.9
7 June	159.1	201.6	—	—	—
6 June	159.3	201.8	—	—	—
5 June	159.4	201.8	159.5	190.0	86.7
4 June	160.6	202.6	159.6	188.1	87.2
3 June	162.7	204.8	161.8	188.5	89.6
2 June	167.8	209.0	164.2	190.5	86.2
1 June	168.8	210.4	166.5	193.3	86.4
31 May	169.8	211.8	—	—	—
30 May	170.3	212.9	—	—	—
29 May	170.6	213.3	169.5	197.1	81.2
28 May	172.2	215.5	172.2	201.6	83.9
27 May	173.3	216.9	175.2	205.6	85.6
26 May	175.5	219.6	178.8	210.3	90.2
25 May	176.5	221.5	180.1	211.2	—
24 May	176.9	222.7	—	—	—
23 May	176.8	222.9	—	—	—
22 May	176.7	223.1	180.7	211.5	94.3
21 May	177.2	223.9	180.2	211.0	93.3
20 May	176.7	224.9	178.4	209.3	95.8
19 May	176.7	225.3	175.1	206.6	101.5
18 May	175.2	225.5	173.1	205.1	102.5
17 May	175.0	225.9	—	—	—
16 May	183.5	226.1	—	—	—
15 May	181.6	226.2	172.0	203.6	100.2
14 May	174.3	226.7	172.2	203.3	96.6
13 May	175.0	228.3	173.0	204.6	95.5
12 May	176.2	230.0	175.6	208.1	97.0
11 May	177.7	232.6	178.1	211.2	91.9
10 May	179.4	233.2	—	—	—
9 May	180.3	235.8	—	—	—
8 May	180.3	236.1	181.2	218.2	89.9
7 May	179.8	237.1	182.0	221.9	88.4
6 May	179.3	237.6	181.5	224.3	90.2
5 May	177.8	238.3	182.5	227.3	100.1
4 May	176.8	238.7	182.4	227.8	—
3 May	175.8	239.1	—	—	—
2 May	175.0	239.4	—	—	—
1 May	175.0	239.5	182.4	227.7	103.0
30 Apr	174.9	240.4	181.4	227.0	108.8
29 Apr	174.8	242.1	180.0	226.3	109.5
28 Apr	174.9	243.2	179.1	224.8	103.0
27 Apr	175.3	246.7	179.1	225.1	99.6
26 Apr	175.8	246.6	—	—	—
25 Apr	176.8	248.2	—	—	—
24 Apr	177.1	248.9	179.4	225.7	98.3
23 Apr	177.8	252.9	181.6	230.2	99.5
22 Apr	180.9	261.3	183.6	239.3	99.6
21 Apr	187.0	274.1	186.3	250.2	93.2
20 Apr	191.3	283.2	187.6	256.3	90.6
19 Apr	196.1	290.6	—	—	—
18 Apr	198.1	291.3	—	—	—
17 Apr	199.8	291.4	190.4	264.4	86.3
16 Apr	204.3	295.6	191.8	273.2	102.3
15 Apr	209.5	300.4	195.7	285.9	100.9
14 Apr	216.3	314.6	198.7	296.8	104.7
13 Apr	217.3	316.9	201.3	304.3	109.8
10 Apr	—	—	205.4	319.0	105.8
9 Apr	—	—	208.6	326.0	105.7
8 Apr	—	—	207.8	320.6	108.8
7 Apr	—	—	203.8	301.7	125.2
6 Apr	—	—	203.8	301.5	—
3 Apr	—	—	204.6	299.5	—
2 Apr	—	—	205.3	292.6	116.1
1 Apr	—	—	205.9	288.8	108.3
31 Mar	—	—	230.9	308.1	116.2
30 Mar	—	—	242.7	310.4	111.8
27 Mar	—	—	247.3	310.1	110.9
26 Mar	—	—	249.8	308.7	103.2
25 Mar	—	—	248.5	302.6	98.6
24 Mar	—	—	244.3	294.1	97.9
23 Mar	—	—	242.2	290.0	93.3
20 Mar	—	—	237.2	282.2	105.9
19 Mar	—	—	234.6	278.3	99.3
18 Mar	—	—	230.0	272.1	104.9
17 Mar	—	—	224.4	267.2	96.0
16 Mar	—	—	218.8	260.1	90.1
13 Mar	—	—	210.4	248.9	92.7
12 Mar	—	—	204.9	243.3	90.8
11 Mar	—	—	193.9	227.8	80.0
10 Mar	—	—	188.4	220.7	79.0
9 Mar	—	—	174.8	198.3	84.2
6 Mar	—	—	168.3	185.0	85.8
5 Mar	—	—	162.0	173.2	79.5
4 Mar	—	—	159.6	168.9	72.5
3 Mar	—	—	157.5	165.8	74.6
2 Mar	—	—	156.9	165.6	68.7
27 Feb	—	—	156.0	165.3	63.0
26 Feb	—	—	155.5	164.9	63.6
25 Feb	—	—	154.7	164.4	62.5
24 Feb	—	—	153.1	162.9	63.4
23 Feb	—	—	152.0	161.8	64.0
20 Feb	—	—	151.8	161.4	64.6
19 Feb	—	—	152.4	161.8	65.3
18 Feb	—	—	152.9	162.0	63.9
17 Feb	—	—	153.6	162.6	62.1
16 Feb	—	—	154.0	163.1	—
13 Feb	—	—	153.8	163.1	62.3
12 Feb	—	—	153.2	163.1	61.9
11 Feb	—	—	152.6	163.1	63.1
10 Feb	—	—	152.3	163.0	63.2
9 Feb	—	—	152.2	162.7	63.2
6 Feb	—	—	152.1	162.5	63.2
5 Feb	—	—	152.3	162.3	63.0
4 Feb	—	—	152.6	162.3	64.0
3 Feb	—	—	153.2	162.1	62.7
2 Feb	—	—	153.2	162.0	61.2
30 Jan	—	—	152.5	161.0	65.0
29 Jan	—	—	152.9	161.2	63.7
28 Jan	—	—	153.3	161.3	63.8
27 Jan	—	—	153.4	160.9	63.3
26 Jan	—	—	153.4	160.9	61.4
23 Jan	—	—	153.4	160.5	62.3
22 Jan	—	—	153.5	160.1	60.2
21 Jan	—	—	153.7	159.7	62.0
20 Jan	—	—	153.5	158.6	63.1
19 Jan	—	—	153.6	158.3	—
16 Jan	—	—	153.1	157.1	63.0
15 Jan	—	—	152.5	156.0	62.1
14 Jan	—	—	152.3	155.9	64.9
13 Jan	—	—	152.2	155.7	63.6
12 Jan	—	—	152.2	155.8	61.2
9 Jan	—	—	152.7	156.1	61.3
8 Jan	—	—	153.3	156.5	59.5
7 Jan	—	—	153.8	156.6	57.1
6 Jan	—	—	154.3	156.8	58.0
5 Jan	—	—	154.5	156.9	59.0
2 Jan	—	—	154.7	157.0	58.3
1 Jan	—	—	154.7	157.1	—

Adelaide against the rest of South Australia

Adelaide averaged 197.5 c/L for U91 and the rest of South Australia 207.9 c/L, so reported prices in the rest of South Australia averaged 10.4 c/L more than Adelaide. Adelaide averaged 233.9 c/L for diesel and the rest of South Australia 245.9 c/L, so reported prices in the rest of South Australia averaged 12.0 c/L more than Adelaide.

Source: FuelRadar (fuelradar.com.au)

Each day's average over every station with a price that day. Adelaide is its urban area.

Daily averages (92 rows)

U91 daily averages, Adelaide and Rest of South Australia, 1 July to 30 Sept
Date	Adelaide (c/L)	Rest of South Australia (c/L)	Difference
30 Sept	232.7	244.2	+11.5
29 Sept	233.0	244.2	+11.2
28 Sept	233.1	244.2	+11.1
27 Sept	233.2	244.2	+11.0
26 Sept	233.6	244.3	+10.7
25 Sept	233.6	244.3	+10.7
24 Sept	234.2	244.1	+9.9
23 Sept	234.2	243.5	+9.3
22 Sept	234.3	242.2	+7.9
21 Sept	231.7	240.3	+8.6
20 Sept	230.6	238.9	+8.3
19 Sept	230.0	238.2	+8.2
18 Sept	229.0	237.0	+8.0
17 Sept	224.5	232.6	+8.1
16 Sept	219.1	228.1	+9.0
15 Sept	217.1	224.9	+7.8
14 Sept	213.6	221.9	+8.3
13 Sept	208.5	219.0	+10.5
12 Sept	208.5	218.9	+10.4
11 Sept	208.1	218.1	+10.0
10 Sept	206.1	216.1	+10.0
9 Sept	205.7	215.3	+9.6
8 Sept	205.4	214.7	+9.3
7 Sept	205.1	214.1	+9.0
6 Sept	204.3	213.5	+9.2
5 Sept	204.2	213.7	+9.5
4 Sept	203.1	213.3	+10.2
3 Sept	202.5	213.3	+10.8
2 Sept	201.8	213.3	+11.5
1 Sept	201.8	213.4	+11.6
31 Aug	201.9	213.5	+11.6
30 Aug	202.2	213.6	+11.4
29 Aug	202.2	213.6	+11.4
28 Aug	202.2	213.7	+11.5
27 Aug	202.9	213.8	+10.9
26 Aug	203.3	213.7	+10.4
25 Aug	203.4	213.6	+10.2
24 Aug	203.6	213.5	+9.9
23 Aug	203.9	213.1	+9.2
22 Aug	203.4	212.8	+9.4
21 Aug	203.3	212.4	+9.1
20 Aug	201.8	211.8	+10.0
19 Aug	200.9	211.0	+10.1
18 Aug	199.7	210.7	+11.0
17 Aug	199.1	210.1	+11.0
16 Aug	198.1	209.7	+11.6
15 Aug	197.6	209.6	+12.0
14 Aug	197.0	209.4	+12.4
13 Aug	197.3	210.0	+12.7
12 Aug	198.8	210.8	+12.0
11 Aug	200.5	211.5	+11.0
10 Aug	203.9	212.9	+9.0
9 Aug	206.6	213.9	+7.3
8 Aug	207.5	214.0	+6.5
7 Aug	208.0	214.2	+6.2
6 Aug	209.0	214.1	+5.1
5 Aug	208.0	213.0	+5.0
4 Aug	205.9	210.8	+4.9
3 Aug	201.2	206.7	+5.5
2 Aug	196.3	202.6	+6.3
1 Aug	196.1	202.3	+6.2
31 July	194.4	201.1	+6.7
30 July	193.6	200.2	+6.6
29 July	192.5	199.2	+6.7
28 July	192.0	198.4	+6.4
27 July	189.4	195.7	+6.3
26 July	187.1	193.8	+6.7
25 July	185.3	192.6	+7.3
24 July	182.2	191.5	+9.3
23 July	179.7	189.2	+9.5
22 July	176.5	186.9	+10.4
21 July	174.1	185.2	+11.1
20 July	171.3	183.2	+11.9
19 July	169.3	181.4	+12.1
18 July	168.9	181.2	+12.3
17 July	167.6	180.2	+12.6
16 July	165.4	179.2	+13.8
15 July	163.8	178.3	+14.5
14 July	163.2	178.2	+15.0
13 July	163.3	178.1	+14.8
12 July	163.1	178.0	+14.9
11 July	163.1	178.1	+15.0
10 July	162.9	178.2	+15.3
9 July	162.6	178.5	+15.9
8 July	162.3	178.2	+15.9
7 July	163.2	178.5	+15.3
6 July	164.2	178.7	+14.5
5 July	165.5	178.6	+13.1
4 July	165.5	178.1	+12.6
3 July	165.1	177.4	+12.3
2 July	160.7	174.9	+14.2
1 July	158.2	172.7	+14.5

The price cycle in Adelaide

No price-cycle hike in Adelaide was detected under the margin-based rule in this period. This does not establish why retail prices changed.
Adelaide’s daily U91 average less the Adelaide terminal gate price is the indicative margin, not profit. A hike requires this margin and the retail average each to rise by at least 8.0 c/L within 5 days. Where station-rise counts are available, daily rises of at least 5.0 c/L, summed over the rise, must reach 25% of the station count at the peak; a station can count on more than one day. Rises within 3 days of an excise change are excluded. The margin must then ease by at least half within 21 days; if follow-up is too short, a counted hike can have unconfirmed easing. A regular cycle requires at least two detected hikes. No detected hike does not establish why retail prices changed.

Fuel excise

Fuel excise on petrol and diesel changed from 20.6 c/L to 36.6 c/L on 1 July 2026 and from 36.6 c/L to 53.7 c/L on 3 August 2026. Over the period it averaged 47.6 c/L a litre, before GST.

Fuel excise, September quarter 2026
Petrol and diesel excise	Rate (c/L, before GST)	Change
In force on 1 July 2026	36.6	—
From 1 July 2026Partial restoration; still a temporarily reduced rate, 1 July to 2 August 2026	36.6	+16.0
From 3 August 2026Full rate restored, indexed by the CPI factor of 1.020	53.7	+17.1
Average over the days of 1 July to 30 September 2026	47.57	—

Excise is charged on fuel as it leaves the terminal, so it is already in the terminal gate price; GST is then charged on top.

Source: ATO: Excise duty rates for fuel and petroleum products

The capital cities, U91

Adelaide ranked the cheapest of the 8 capital cities for U91; Adelaide was the cheapest at 197.5 c/L and Canberra the dearest at 206.5 c/L. Adelaide ranked the cheapest of the 8 capital cities for diesel; Adelaide was the cheapest at 233.9 c/L and Canberra the dearest at 248.2 c/L.

Every capital city by average U91 price, September quarter 2026
Capital	Jul	Aug	Sep	Quarter	Change	Stations
AdelaideThis report · Cheapest capital	172.1	202.1	218.8	197.5	+26.4	278
Perth	174.7	200.3	220.1	198.1	+23.0	439
Sydney	173.1	200.0	222.6	198.2	+20.7	677
Melbourne	174.1	201.9	220.3	198.6	+21.2	858
Brisbane	176.4	202.2	222.3	200.0	+20.7	504
Hobart	179.3	206.5	227.3	204.1	+23.0	59
Darwin	179.7	210.3	229.7	206.4	+19.1	46
CanberraDearest capital	183.2	206.7	230.4	206.5	+25.2	38

Cents a litre, cheapest first. Each capital is its ABS urban area, worked out exactly as in its own state’s report. The margin is against its own terminal’s gate price (Canberra uses Sydney’s). Period-average margins are omitted here: comparable daily inputs and weights are not retained for these rows.

The capital cities, diesel

Show the capital cities, diesel

Every capital city by average diesel price, September quarter 2026
Capital	Jul	Aug	Sep	Quarter	Change	Stations
AdelaideThis report · Cheapest capital	200.4	240.8	269.2	233.9	+12.7	76
Perth	198.6	241.2	262.9	234.1	+14.5	201
Sydney	203.1	243.6	266.3	237.0	+13.2	253
Melbourne	204.0	248.0	269.6	240.5	+10.5	416
Brisbane	205.2	247.6	271.8	241.2	+13.8	198
Darwin	206.6	251.8	276.3	244.7	+15.5	48
Hobart	211.9	251.0	272.5	244.9	+11.2	37
CanberraDearest capital	211.4	251.8	282.6	248.2	+4.0	13

Adelaide by area

Inside Adelaide, Adelaide North was the cheapest area for U91 at 196.5 c/L and Adelaide – Central and Hills the dearest at 199.3 c/L, a spread of 2.8 c/L.

Adelaide North196.5 (lowest)
Adelaide West197.5
Adelaide South197.6
Adelaide – Central and Hills199.3

Cents a litre, cheapest U91 first. Areas are the ABS Statistical Areas Level 4 (SA4) inside Adelaide’s urban area, named in plain words (“Brisbane - East” is Brisbane East). An area counts its stations that reported on at least a quarter of the days; its average, station count and cheapest station all come from them. Period-average margins are omitted here: comparable daily inputs and weights are not retained for these rows.

Table viewwith diesel and the cheapest station

Adelaide areas by average price, September quarter 2026
Area (ABS SA4)	U91	U91 change	Diesel	Diesel margin	U91 stations	Cheapest U91 station
Adelaide North	196.5	+26.5	234.1	4.2	101	Costco Kilburn185.4 c/L average
Adelaide West	197.5	+26.2	237.6	7.7	68	U-Go West Hindmarsh191.5 c/L average
Adelaide South	197.6	+26.0	227.4	−2.5	63	United Melrose Park190.3 c/L average
Adelaide – Central and Hills	199.3	+26.9	226.9	−3.0	46	Solo Nailsworth193.6 c/L average

Regional towns ranked, U91

The cheapest U91 outside Adelaide was in Barmera, at 195.0 c/L, 2.5 c/L below Adelaide. At the other end, Nullarbor (rural) averaged 288.4 c/L, 90.9 c/L above Adelaide. 1 of the 59 towns we ranked averaged less than Adelaide for U91. Barmera was the cheapest regional town for diesel at 233.0 c/L and Nullarbor (rural) the dearest at 315.8 c/L, a spread of 82.8 c/L.

Source: FuelRadar (fuelradar.com.au)

Cents a litre, cheapest first. A town is ranked with at least two stations reporting through the period and a price on most days; 124 smaller places were left out. The cheapest station’s figure is its own average over the period.

Table viewwith the stations and the cheapest station

South Australia regional towns by average U91 price, September quarter 2026
Town	Jul	Aug	Sep	Quarter	Against Adelaide	Stations	Cheapest station
Barmera	167.6	200.8	220.1	195.0	−2.5	3	United Barmera Roadhouse192.2 c/L average
Mount Gambier	172.6	201.3	220.4	197.8	+0.3	16	APCO Mount Gambier191.5 c/L average
Roseworthy	172.7	202.4	219.8	198.1	+0.6	2	Recharge Roseworthy Road197.7 c/L average
Angle Vale	172.8	203.1	219.3	198.2	+0.7	3	AMPM Angle Vale197.6 c/L average
Nuriootpa	171.6	204.5	220.1	198.5	+1.0	4	X Convenience Nuriootpa197.7 c/L average
Gawler	172.7	203.3	220.4	198.6	+1.1	7	AMPM Gawler196.4 c/L average
Balaklava	174.4	201.4	221.6	198.9	+1.4	2	McCracken Ford198.1 c/L average
Cowell	177.8	202.8	216.7	198.9	+1.4	2	Mobil Cowell Roadhouse197.5 c/L average
Berri	173.5	204.9	220.5	199.0	+1.5	3	United Berri192.4 c/L average
Crafers–Bridgewater	172.7	203.9	221.1	199.0	+1.5	5	Bridgewater Service Station197.5 c/L average
Angaston	173.1	203.8	221.1	199.1	+1.6	2	Barossa Roadhouse197.9 c/L average
Victor Harbor	179.8	203.7	217.7	200.2	+2.7	7	Liberty McCracken197.4 c/L average
Virginia	175.1	204.6	221.5	200.2	+2.7	3	X Convenience Virginia North199.7 c/L average
Strathalbyn	174.8	205.8	220.9	200.3	+2.8	3	United Strathalbyn199.2 c/L average
Tintinara	176.6	205.0	220.1	200.4	+2.9	3	United Tintinara199.3 c/L average
Edithburgh	176.7	203.6	223.2	200.9	+3.4	2	Edithburgh Deli & Newsagency199.6 c/L average
Keith	177.0	206.4	221.7	201.5	+4.0	4	24 Seven Keith199.8 c/L average
Waikerie	179.1	201.3	220.0	201.6	+4.1	2	Sutton Ford199.6 c/L average
Kapunda	175.0	206.9	223.8	201.7	+4.2	2	Mobil Kapunda201.5 c/L average
Mount Barker	175.4	206.8	224.6	202.0	+4.5	9	BP Littlehampton200.5 c/L average
Port Wakefield	175.9	206.7	224.2	202.0	+4.5	3	United Port Wakefield201.5 c/L average
Meadows	176.7	207.0	224.2	202.4	+4.9	2	Mogas Meadows201.8 c/L average
Port Vincent	177.1	206.2	229.7	202.6	+5.1	2	Port Vincent Service Station202.5 c/L average
Bordertown	179.4	206.2	224.4	203.1	+5.6	5	Liberty Bordertown200.1 c/L average
Tailem Bend	177.7	206.9	225.4	203.1	+5.6	4	United Tailem Bend200.9 c/L average
Lameroo	179.7	206.8	224.2	203.4	+5.9	2	Ampol Lameroo (Mallee Tyres)201.3 c/L average
Murray Bridge	176.8	208.5	227.4	204.0	+6.5	9	United Murray Bridge202.5 c/L average
Mannum	178.9	208.9	226.2	204.5	+7.0	2	Astron Mannum203.8 c/L average
Burra	180.9	205.9	228.0	204.7	+7.2	2	Burra Roadhouse203.7 c/L average
Port Augusta	184.9	206.6	222.7	204.7	+7.2	10	Liberty Port Augusta198.3 c/L average
Gladstone	182.4	209.1	226.0	205.4	+7.9	3	H T Harslett Rural203.5 c/L average
Loxton	182.5	208.8	225.2	205.5	+8.0	5	Perrys Loxton203.4 c/L average
Maitland	183.1	208.4	225.5	205.5	+8.0	2	Eglington Bros203.4 c/L average
Yorketown	180.3	210.0	228.0	205.9	+8.4	2	Yorketown Fuel205.1 c/L average
Eudunda	182.4	209.6	227.3	206.2	+8.7	2	Eudunda Road House203.1 c/L average
Clare	182.3	210.1	227.3	206.3	+8.8	4	Clare Rural Supplies205.2 c/L average
Laura	182.4	211.1	227.0	206.6	+9.1	2	Stevens Motors Pty Ltd205.8 c/L average
Wilmington	184.0	209.3	227.5	206.7	+9.2	2	G M Hitch Auto Repairs205.9 c/L average
Jamestown	183.4	210.8	227.9	207.2	+9.7	3	Mobil Jamestown207.0 c/L average
Yunta (rural)	183.4	210.8	228.1	207.2	+9.7	2	Mobil Yunta207.2 c/L average
Kadina	186.2	210.5	227.7	207.9	+10.4	4	Hunts Fuel Kadina207.3 c/L average
Port Lincoln	186.8	210.3	227.4	208.0	+10.5	8	Eyre Fuels Liberty205.7 c/L average
Renmark	185.1	210.9	228.7	208.0	+10.5	3	Astron Renmark207.3 c/L average
Warnertown (rural)	185.0	211.7	228.8	208.3	+10.8	2	Ampol Bungama208.1 c/L average
Port Pirie	185.4	211.7	229.0	208.5	+11.0	7	Fuchs Garage207.4 c/L average
Wallaroo	185.8	213.4	229.8	208.6	+11.1	3	Mobil Wallaroo207.6 c/L average
Kingston SE	188.1	212.0	228.2	209.2	+11.7	3	BP Kingston SE208.2 c/L average
Naracoorte	187.4	211.5	229.8	209.3	+11.8	6	Ampol Naracoorte Depot Front – TASCO206.7 c/L average
Moonta	187.7	211.1	228.1	209.9	+12.4	3	Mobil Moonta207.6 c/L average
Whyalla	188.6	212.5	229.5	210.0	+12.5	7	United Whyalla209.4 c/L average
Tumby Bay	183.3	216.9	231.0	210.1	+12.6	4	Curtis's Sales & Service208.5 c/L average
Streaky Bay	189.8	212.3	232.4	211.0	+13.5	3	Ampol Streaky Bay209.1 c/L average
Goolwa	188.8	215.2	230.0	211.1	+13.6	4	Shell Goolwa - South Coast Marine209.5 c/L average
Ceduna	192.4	214.1	229.9	211.9	+14.4	5	Liberty Ceduna203.5 c/L average
Cummins	192.3	219.6	237.2	215.9	+18.4	2	Bascombe Autoag214.0 c/L average
Kingscote	204.6	226.4	243.2	224.5	+27.0	2	Ampol Kingscote224.5 c/L average
Hawker	200.5	230.5	252.5	226.6	+29.1	3	BP Hawker225.9 c/L average
Coober Pedy	223.9	235.4	252.5	237.1	+39.6	3	Ampol Coober236.9 c/L average
Nullarbor (rural)	264.1	293.8	309.0	288.4	+90.9	2	Border Village Roadhouse286.8 c/L average

Regional towns ranked, diesel

Source: FuelRadar (fuelradar.com.au)

Cents a litre, cheapest first. A town is ranked with at least two stations reporting through the period and a price on most days; 120 smaller places were left out. The cheapest station’s figure is its own average over the period.

Table viewwith the stations and the cheapest station

South Australia regional towns by average diesel price, September quarter 2026
Town	Jul	Aug	Sep	Quarter	Against Adelaide	Stations	Cheapest station
Barmera	193.0	241.1	265.8	233.0	−0.9	3	Liberty Barmera230.4 c/L average
Cowell	197.9	242.7	261.4	233.7	−0.2	2	Eyre Fuels Cowell232.9 c/L average
Tintinara	200.4	242.3	262.6	234.8	+0.9	3	United Tintinara232.8 c/L average
Port Vincent	197.8	245.5	268.1	235.0	+1.1	2	Port Vincent Service Station233.9 c/L average
Berri	198.7	243.2	261.7	235.4	+1.5	3	United Berri230.4 c/L average
Edithburgh	197.3	245.4	263.9	235.4	+1.5	2	Edithburgh Deli & Newsagency233.3 c/L average
Mount Gambier	197.8	242.6	264.5	235.4	+1.5	14	APCO Mount Gambier227.2 c/L average
Keith	200.6	244.1	263.7	235.8	+1.9	4	Keith OPT233.5 c/L average
Lameroo	199.4	244.6	267.4	236.8	+2.9	2	Ampol Lameroo (Mallee Tyres)235.4 c/L average
Balaklava	201.0	244.4	266.5	237.0	+3.1	3	Simon Exhaust & Auto Repairs233.8 c/L average
Renmark	201.1	245.4	268.1	237.9	+4.0	3	Renmark OPT231.8 c/L average
Roseworthy	203.0	245.1	267.4	238.2	+4.3	2	Recharge Roseworthy Road237.5 c/L average
Victor Harbor	203.6	246.0	266.5	238.4	+4.5	3	Liberty McCracken234.8 c/L average
Tailem Bend	203.6	245.9	268.3	238.9	+5.0	3	United Tailem Bend236.9 c/L average
Bordertown	204.1	246.2	267.5	239.1	+5.2	6	Liberty Bordertown233.3 c/L average
Yorketown	201.7	248.3	268.3	239.1	+5.2	2	Yorketown Fuel238.3 c/L average
Port Wakefield	201.7	244.7	272.2	239.2	+5.3	2	United Port Wakefield239.1 c/L average
Meningie	204.6	247.3	268.1	239.7	+5.8	2	Meningie Perrys Unmanned238.3 c/L average
Port Augusta West (rural)	203.5	247.9	268.7	239.7	+5.8	4	Port Augusta OPT234.9 c/L average
Angaston	202.4	247.2	270.7	239.8	+5.9	2	Angaston Motors239.0 c/L average
Ardrossan	203.7	247.6	269.7	240.0	+6.1	2	Ardrossan (Maxi-Tankers)234.4 c/L average
Gladstone	207.2	246.2	269.2	240.2	+6.3	3	H T Harslett Rural238.8 c/L average
Kimba	202.4	249.5	272.9	240.4	+6.5	2	MRO Kimba237.6 c/L average
Crafers–Bridgewater	203.8	247.2	271.8	240.6	+6.7	2	Bridgewater Service Station239.7 c/L average
Wilmington	205.9	248.9	268.1	240.7	+6.8	2	G M Hitch Auto Repairs240.1 c/L average
Port Lincoln	207.5	246.2	274.2	240.9	+7.0	8	Ampol Port Lincoln213.3 c/L average
Strathalbyn	203.0	248.4	273.1	241.1	+7.2	3	United Strathalbyn239.5 c/L average
Burra	206.5	249.3	269.8	241.6	+7.7	3	Burra Roadhouse238.2 c/L average
Port Augusta	205.8	248.9	270.4	241.8	+7.9	9	Liberty Port Augusta234.6 c/L average
Loxton	207.6	248.1	271.3	242.0	+8.1	3	Perrys Loxton241.2 c/L average
Mount Barker	205.8	248.9	272.1	242.0	+8.1	3	Ampol Littlehampton238.9 c/L average
Booleroo Centre	207.7	247.7	271.8	242.1	+8.2	2	Perrys Booleroo Centre241.3 c/L average
Peterborough	208.4	247.4	271.4	242.1	+8.2	2	BP OPT Peterborough241.3 c/L average
Yunta (rural)	208.4	247.7	271.8	242.3	+8.4	2	Shell Yunta241.7 c/L average
Pinnaroo	206.5	248.3	274.4	242.7	+8.8	2	Shell Pinnaroo241.6 c/L average
Jamestown	208.9	248.2	272.6	242.9	+9.0	2	Ampol Jamestown RSB242.9 c/L average
Laura	209.4	249.1	272.1	243.2	+9.3	2	Stevens Motors Pty Ltd241.4 c/L average
Two Wells (rural)	207.3	250.4	273.4	243.4	+9.5	2	24 Seven Two Wells238.9 c/L average
Clare	208.9	249.0	273.8	243.6	+9.7	2	Ampol Clare243.2 c/L average
Kadina	210.3	248.4	273.8	243.8	+9.9	2	Hunts Fuel Kadina242.9 c/L average
Eudunda	208.5	252.3	271.8	243.9	+10.0	2	SSkids Tyres & Mechanical243.8 c/L average
Wudinna	207.7	253.1	276.3	243.9	+10.0	3	Hunts Fuel Wudinna241.3 c/L average
Streaky Bay	208.7	253.9	274.6	244.8	+10.9	3	Killas Streaky Bay - Perrys242.4 c/L average
Murray Bridge	209.9	250.6	276.0	245.2	+11.3	4	United Murray Bridge243.2 c/L average
Meadows	209.7	251.7	276.0	245.5	+11.6	2	Mogas Meadows244.7 c/L average
Kingston SE	209.9	250.7	277.6	245.7	+11.8	2	BP Kingston SE244.7 c/L average
Tumby Bay	210.2	257.2	273.4	245.7	+11.8	5	Bawdens Rural244.5 c/L average
Port Pirie	210.7	251.5	276.7	246.0	+12.1	4	Fuchs Garage244.9 c/L average
Warnertown (rural)	210.5	251.6	277.3	246.0	+12.1	2	Ampol Bungama245.6 c/L average
Cummins	209.4	257.0	276.2	246.2	+12.3	3	Perrys Unmanned – Cummins240.2 c/L average
Naracoorte	210.8	252.9	276.9	246.5	+12.6	4	Ampol Naracoorte Depot Front – TASCO242.9 c/L average
Ceduna	212.9	253.9	274.2	246.7	+12.8	7	Liberty Ceduna234.6 c/L average
Whyalla	211.5	252.7	277.2	246.9	+13.0	6	Perrys Whyalla246.1 c/L average
Robe	214.6	252.8	275.8	247.4	+13.5	2	K&S Fuels Robe245.2 c/L average
Moonta	215.9	250.3	276.6	250.5	+16.6	2	Shell Moonta245.9 c/L average
Lock (rural)	216.8	255.5	277.1	251.6	+17.7	2	Perrys Lock242.7 c/L average
Goolwa	231.4	257.5	277.4	255.2	+21.3	2	BP Goolwa254.6 c/L average
Kingscote	229.5	265.5	285.9	260.0	+26.1	2	Ampol Kingscote259.9 c/L average
Hawker	227.8	271.1	292.3	263.0	+29.1	3	BP Hawker259.3 c/L average
Lyndhurst (rural)	237.1	279.2	300.1	271.8	+37.9	2	IOR Lyndhurst271.8 c/L average
Coober Pedy	249.8	285.1	305.9	280.0	+46.1	2	Perrys Coober Pedy279.5 c/L average
Nullarbor (rural)	284.1	317.4	344.6	315.8	+81.9	2	Border Village Roadhouse312.3 c/L average

Other fuels: cheapest and dearest towns

Cheapest and dearest towns for the other fuels, September quarter 2026
Fuel	Cheapest town (c/L)	Dearest town (c/L)	Towns ranked
E10	Barmera 188.5	Mount Gambier 189.7	2
Premium 95	Angle Vale 214.4	Nullarbor (rural) 301.2	23
Premium 98	Balaklava 216.6	Coober Pedy 259.6	50
LPG	Gawler 108.0	Mount Gambier 122.5	4

Fewer stations sell these fuels, so fewer towns are ranked.

Regional centres, U91

Mount Gambier was the cheapest of the 10 regional centres we ranked for U91 at 197.8 c/L, and Whyalla the dearest at 210.0 c/L. 0 of them averaged less than Adelaide.

Regional centres ranked by their U91 average, September quarter 2026
#	Centre	Size	Quarter	Against Adelaide	Change	Diesel
1	Mount Gambier	20,000 to 49,999 people	197.8	+0.3	+19.4	235.4
2	Gawler	20,000 to 49,999 people	198.6	+1.1	+27.4	—
3	Crafers–Bridgewater	10,000 to 19,999 people	199.0	+1.5	+25.9	240.6
4	Victor Harbor	10,000 to 19,999 people	200.2	+2.7	+18.2	238.4
5	Mount Barker	20,000 to 49,999 people	202.0	+4.5	+26.3	242.0
6	Murray Bridge	10,000 to 19,999 people	204.0	+6.5	+25.5	245.2
7	Port Augusta	10,000 to 19,999 people	204.7	+7.2	+18.6	241.8
8	Port Lincoln	10,000 to 19,999 people	208.0	+10.5	+19.6	240.9
9	Port Pirie	10,000 to 19,999 people	208.5	+11.0	+19.6	246.0
10	Whyalla	20,000 to 49,999 people	210.0	+12.5	+17.9	246.9

Cents a litre, cheapest first. A regional centre is a large regional city we map on its own, or an ABS urban centre of 10,000 people or more (2021 Census) outside Adelaide.

Against Adelaide, month by month, U91

Adelaide North averaged 196.5 c/L for U91, 1.0 c/L below Adelaide, and was cheaper than Adelaide in 6 of 6 months since our records began on 13 April 2026. Adelaide West averaged 197.5 c/L for U91, the same as Adelaide, and was cheaper than Adelaide in 3 of 6 months since our records began on 13 April 2026. Adelaide South averaged 197.6 c/L for U91, 0.1 c/L above Adelaide, and was cheaper than Adelaide in 0 of 6 months since our records began on 13 April 2026. Adelaide – Central and Hills averaged 199.3 c/L for U91, 1.8 c/L above Adelaide, and was cheaper than Adelaide in 0 of 6 months since our records began on 13 April 2026.

Each area’s U91 average against Adelaide’s: the September quarter 2026, since our records began on 13 April 2026, and each month
Area	Quarter	Against Adelaide	Year so far	Apr	May	Jun	Jul	Aug	Sep	Months cheaper
Adelaide North	196.5	−1.0	−0.9	−0.7	−1.0	−1.2	−0.4	−1.2	−1.1	6 of 6
Adelaide West	197.5	0.0	+0.1	+0.6	−0.1	+0.2	−0.6	+0.5	−0.1	3 of 6
Adelaide South	197.6	+0.1	+0.4	0.0	+0.5	+0.7	+0.3	+0.1	+0.2	0 of 6
Adelaide – Central and Hills	199.3	+1.8	+1.6	+0.4	+1.9	+1.1	+1.6	+1.9	+2.3	0 of 6

Cents a litre; negative is cheaper than Adelaide. The areas are Adelaide’s ABS SA4 areas and the regional centres of 50,000 people or more.

Cheapest and dearest in each area, U91

Roseworthy was the cheapest town in Adelaide North for U91 at 198.1 c/L and Virginia the dearest at 200.2 c/L. Crafers–Bridgewater was the cheapest town in Adelaide – Central and Hills for U91 at 199.0 c/L and Meadows the dearest at 202.4 c/L. Of the suburbs and towns we ranked, the widest spread was in Outback South Australia: Cowell at 198.9 c/L to Nullarbor at 288.4 c/L, a gap of 89.5 c/L.

The cheapest and dearest suburb or town in each ABS SA4 area, September quarter 2026
Area	Cheapest suburb or town	Dearest	Cheapest town outside Adelaide	Cheapest since records began
Adelaide NorthAdelaide area	Klemzig192.8 c/L	Bolivar201.1 c/L	Roseworthy198.1 c/L	Klemzig181.3 c/L
Adelaide SouthAdelaide area	Old Noarlunga193.6 c/L	O'halloran Hill200.9 c/L	—	St Marys182.4 c/L
Adelaide WestAdelaide area	Port Adelaide193.6 c/L	West Beach199.7 c/L	—	Port Adelaide181.5 c/L
Adelaide – Central and HillsAdelaide area	Nailsworth194.4 c/L	Meadows202.4 c/L	Crafers–Bridgewater199.0 c/L	Nailsworth183.3 c/L
Barossa – Yorke – Mid North	Nuriootpa198.5 c/L	Port Pirie208.7 c/L	Nuriootpa198.5 c/L	Nuriootpa187.5 c/L
Outback South Australia	Cowell198.9 c/L	Nullarbor288.4 c/L	Cowell198.9 c/L	Cowell191.6 c/L
South Australia South East	Barmera195.0 c/L	Kingscote224.5 c/L	Barmera195.0 c/L	Barmera185.9 c/L

A suburb or town is the ABS locality a station sits in, ranked within its SA4 by the same rule as the towns.

The year so far: since our records began on 13 April 2026

Since our records began on 13 April 2026, U91 has averaged 193.2 c/L across South Australia and 185.4 c/L in Adelaide; Angle Vale has been the cheapest town at 185.5 c/L, and 0 of the 59 towns we ranked have averaged less than Adelaide.

Averages over every station-day since our records began on 13 April 2026
Fuel	South Australia	Adelaide	Rest of South Australia
U91	193.2	185.4	199.6
Diesel	239.2	227.8	241.9

0 of the 59 towns we ranked averaged less than Adelaide for U91.

Cheapest towns since our records began on 13 April 2026, U91

Cheapest towns since our records began on 13 April 2026, U91
Town	Average	Against Adelaide
Angle Vale	185.5	+0.1
Barmera	185.9	+0.5
Gawler	186.2	+0.8
Roseworthy	186.2	+0.8
Crafers–Bridgewater	187.1	+1.7
Nuriootpa	187.5	+2.1
Virginia	187.5	+2.1
Strathalbyn	188.0	+2.6
Mount Gambier	188.9	+3.5
Mount Barker	190.0	+4.6

Dearest towns since our records began on 13 April 2026, U91

Dearest towns since our records began on 13 April 2026, U91
Town	Average	Against Adelaide
Nullarbor (rural)	283.1	+97.7
Coober Pedy	240.5	+55.1
Hawker	218.3	+32.9
Kingscote	217.4	+32.0
Streaky Bay	210.6	+25.2
Cummins	210.5	+25.1
Ceduna	204.7	+19.3
Goolwa	203.5	+18.1
Tumby Bay	203.2	+17.8
Moonta	202.0	+16.6

The day of the week to buy U91

In the September quarter 2026, Sunday was the cheapest day to buy U91 in Adelaide and Saturday the dearest, 0.6 c/L apart on average; since our records began on 13 April 2026, Wednesday has been the cheapest.

The cheapest and dearest day of the week, and how far apart they were on average
Place	Cheapest / dearest, quarter	On 60 litres	Since records began
Adelaide	Sunday / Saturday0.6 c/L apart	$0.36	Wednesday / Saturday0.8 c/L apart
GawlerRegional centre	Wednesday / Monday0.7 c/L apart	$0.42	Thursday / Saturday0.6 c/L apart
Mount BarkerRegional centre	Sunday / Tuesday0.8 c/L apart	$0.48	Wednesday / Tuesday0.6 c/L apart
Mount GambierRegional centre	Sunday / Friday0.7 c/L apart	$0.42	Monday / Tuesday0.2 c/L apart
WhyallaRegional centre	Monday / Saturday0.5 c/L apart	$0.30	Monday / Saturday0.4 c/L apart
Crafers–BridgewaterRegional centre	Monday / Thursday0.5 c/L apart	$0.30	Wednesday / Saturday0.9 c/L apart
Murray BridgeRegional centre	Sunday / Friday0.5 c/L apart	$0.30	Tuesday / Saturday0.3 c/L apart
Port AugustaRegional centre	Monday / Saturday0.5 c/L apart	$0.30	Monday / Saturday0.3 c/L apart
Port LincolnRegional centre	Monday / Thursday0.5 c/L apart	$0.30	Wednesday / Saturday0.4 c/L apart
Port PirieRegional centre	Monday / Thursday0.7 c/L apart	$0.42	Monday / Saturday0.6 c/L apart
Victor HarborRegional centre	Wednesday / Monday0.7 c/L apart	$0.42	Wednesday / Monday0.3 c/L apart

Each day’s average against the seven days centred on it, averaged by weekday, so a steady rise or fall does not favour one end of the week. A place needs four of each weekday with prices from five stations or more; a month usually shows the year so far only.

What a 60-litre tank of U91 saved

Filling a 60-litre tank with U91 in Barmera rather than Nullarbor (rural) saved $56.04 on average in the September quarter 2026. In Barmera the same tank cost $1.50 less than in Adelaide. At Costco Kilburn in Kilburn, the cheapest station we ranked, it cost $10.68 less than at the state average.

Differences of the published averages, September quarter 2026
Comparison	Cheaper	Dearer	A litre	A tank
Cheapest and dearest town	Barmera195.0 c/L	Nullarbor (rural)288.4 c/L	93.4	$56.04
Cheapest and dearest regional centre	Mount Gambier197.8 c/L	Whyalla210.0 c/L	12.2	$7.32
Cheapest town and Adelaide	Barmera195.0 c/L	Adelaide197.5 c/L	2.5	$1.50
Cheapest station and the state average	Costco Kilburn185.4 c/L	South Australia203.2 c/L	17.8	$10.68

Towns that moved most on the partial June quarter 2026, U91

Angle Vale rose most on the partial June quarter 2026, up 27.7 c/L to 198.2 c/L, while Coober Pedy fell most, down 8.1 c/L to 237.1 c/L.

Towns that moved most on the partial June quarter 2026, U91
Town	Before	Quarter	Change
Angle ValeRose	170.5	198.2	+27.7
VirginiaRose	172.7	200.2	+27.5
GawlerRose	171.2	198.6	+27.4
StrathalbynRose	173.7	200.3	+26.6
Mount BarkerRose	175.7	202.0	+26.3
Coober PedyFell	245.2	237.1	−8.1

Independents and the major brands, U91

Independent service stations averaged 204.0 c/L for U91 and the major brands 202.8 c/L, 1.2 c/L more at the independents; in Adelaide the gap was 3.3 c/L. Of the brands with five stations or more, U-Go averaged least at 191.6 c/L and Mogas most at 216.0 c/L.

Station-day averages, September quarter 2026
Where	Major brands	Independents	Difference	Stations
South Australia	202.8	204.0	+1.2	—
Adelaide	198.3	195.0	−3.3	—
U-GoIndependent	—	191.6	—	5
SoloIndependent	—	193.1	—	10
UnitedMajor brand	196.0	—	—	32
X ConvenienceIndependent	—	197.0	—	45
LibertyIndependent	—	199.2	—	14
CaltexMajor brand	200.8	—	—	27
On The Run (OTR)Major brand	200.8	—	—	155
AM/PMIndependent	—	201.2	—	18
Reddy ExpressMajor brand	203.7	—	—	16
AmpolMajor brand	203.9	—	—	113
ShellMajor brand	205.7	—	—	19
BPMajor brand	206.6	—	—	37
PerrysIndependent	—	209.9	—	9
MobilMajor brand	210.2	—	—	31
IndependentIndependent	—	211.0	—	81
MogasIndependent	—	216.0	—	7

The major brands are 7-Eleven, Ampol, BP, Caltex, EG, Mobil, On The Run (OTR), Reddy Express, Shell and United; every other brand, and a station without one, is independent. Stations with a price on a quarter of the days; a brand is listed with five or more.

Cheapest service stations, U91

Costco Kilburn in Kilburn was the cheapest service station we ranked for U91 at 185.4 c/L, and Pink Roadhouse in Oodnadatta the dearest at 318.6 c/L.

623 stations with a price on half the days or more, September quarter 2026
Station	Place	Average
Costco KilburnCostco	Kilburn	185.4
Mount Burr General Store and LiquorIndependent	Mount Burr	188.6
United Melrose ParkUnited	Melrose Park	190.3
U-Go ClearviewU-Go	Enfield	190.6
U-Go St MarysU-Go	St Marys	190.6
Leroy’s Munno ParaIndependent	Smithfield	190.9
Ampol Foodary EdwardstownAmpol	Edwardstown	191.2
Leroy’s HackhamIndependent	Hackham	191.3
Liberty Clarence GardensLiberty	Clarence Gardens	191.4
APCO Mount GambierApco Service Stations	Mount Gambier	191.5

Dearest service stations, U91

623 stations with a price on half the days or more, September quarter 2026
Station	Place	Average
Pink RoadhouseIndependent	Oodnadatta	318.6
Nullarbor RoadhouseMobil	Nullarbor	290.1
Border Village RoadhouseBP	Nullarbor	286.8
Leigh Creek MotorsPerrys	Leigh Creek	255.3
Cadney Homestead RoadhouseMobil	Tieyon	252.8
Marla Travellers RestBP	Marla	252.4
Arkaroola Wilderness SanctuaryMogas	Arkaroola Village	250.4
Smoky Bay General StoreIndependent	Smoky Bay	244.8
Vivonne Bay General Store & Bottle ShopIndependent	Vivonne Bay	242.2
Cooke's Outback MotorsIndependent	Copley	238.2

Diesel against U91

Diesel cost 36.4 c/L more than U91 in Adelaide, against 50.1 c/L on the partial June quarter 2026. Among the towns, the gap was narrowest in Nullarbor (rural) at 27.4 c/L and widest in Goolwa at 44.1 c/L.

How much more diesel cost than U91, September quarter 2026
Where	Diesel less U91	Quarter	Change
Adelaide	36.4	50.1	−13.7
South Australia	40.5	52.8	−12.3
Rest of South Australia	38.0	47.6	−9.6
Nullarbor (rural)Narrowest gap	27.4	—	—
RenmarkNarrowest gap	29.9	—	—
CumminsNarrowest gap	30.3	—	—
Port VincentNarrowest gap	32.4	—	—
Port LincolnNarrowest gap	32.9	—	—
GoolwaWidest gap	44.1	—	—
MeadowsWidest gap	43.1	—	—
Coober PedyWidest gap	42.9	—	—
Crafers–BridgewaterWidest gap	41.6	—	—
Murray BridgeWidest gap	41.2	—	—

Crude oil and the dollar

Brent crude averaged US$96.3 a barrel in the September quarter 2026, against US$63.7 in the December quarter 2025.

Brent crude oil and the Australian dollar, September quarter 2026 and the periods before
Period	Brent, US$ a barrel	US$ per A$	Brent, A$ a barrel	Brent, A$ c/L	Trading days
September quarter 2026	96.3	0.7062	136.7	86.0	65
June quarter 2026	102.6	0.7101	144.8	91.1	61
March quarter 2026	80.7	0.6956	116.5	73.3	63
December quarter 2025	63.7	0.6568	96.9	61.0	64

Brent: Europe Brent spot price FOB (US Energy Information Administration). Exchange rate: the Federal Reserve’s noon buying rate in New York. Both via FRED, Federal Reserve Bank of St. Louis, averaged over the days each is published; the Australian-dollar figures use each day’s rate. A litre is a barrel divided by 158.987. We use these free benchmarks because the refined-petrol and diesel benchmarks Australian wholesale prices follow (Singapore) are sold by subscription.

Data quality, method and sources

We counted 688 distinct stations with eligible input prices, including carried prices, over 186,801 station–fuel–days across published fuels. Our price records begin on 13 April 2026.

What the figures cover, September quarter 2026
Coverage	Figure
Service stations listed	705
Stations with an eligible input price	688
Station–fuel–days counted (published fuels)	186,801
Days covered	1 July 2026 to 30 September 2026
Station-price records used here begin	13 April 2026
Towns ranked for U91124 left out: too few steady stations	59

Coverage by fuel and period

The listed count is the inventory used at build time, not a historical census of every operating station. One station selling two fuels on one day contributes two station–fuel–days. Fuel-specific counts must not be added to obtain a distinct station total.
Fuel and period	Distinct stations	Station–fuel–days	Calendar days
U91, September quarter 20261 Jul to 30 Sept 2026	630	56,800	92
U91, June quarter 202613 Apr to 30 Jun 2026	630	46,739	79
E10, September quarter 20261 Jul to 30 Sept 2026	48	4,402	92
E10, June quarter 202613 Apr to 30 Jun 2026	48	3,761	79
DSL, September quarter 20261 Jul to 30 Sept 2026	389	33,790	92
DSL, June quarter 202613 Apr to 30 Jun 2026	386	27,987	79
P95, September quarter 20261 Jul to 30 Sept 2026	358	32,393	92
P95, June quarter 202613 Apr to 30 Jun 2026	357	26,999	79
P98, September quarter 20261 Jul to 30 Sept 2026	548	49,535	92
P98, June quarter 202613 Apr to 30 Jun 2026	549	40,959	79
LPG, September quarter 20261 Jul to 30 Sept 2026	134	9,881	92
LPG, June quarter 202613 Apr to 30 Jun 2026	121	3,574	79

The listed count is the inventory used at build time, not a historical census of every operating station. One station selling two fuels on one day contributes two station–fuel–days. Fuel-specific counts must not be added to obtain a distinct station total. Distinct stations contributing eligible prices for this fuel and period. Calendar days describe the window, not new observations.

About this edition

How we worked out these figures, and our sources · What this edition can establish

How we worked out these figures, and our sources

What the average measures
Reported station-day prices, not purchases. Each station counts once per day with an eligible price; stations with more covered days contribute more. The mean is not weighted by litres sold and does not measure what the average driver paid.
Which history this uses
This report's station-price records begin on 13 April 2026. The separately published daily city-average series can begin earlier and use different boundaries and carry rules. Compare figures within the same series.
Coverage and carry
Adelaide uses its ABS urban area. An eligible price can be carried forward for up to 30 days. A covered day can therefore contain an earlier reported price. Station-days are observations, not distinct stations. The report does not quantify the share of carried prices or all excluded reports.
Wholesale spreads
Retail less terminal gate price is a gross indicative spread, not profit. It also covers transport, site and operating costs. Brent is a crude-oil benchmark, not a refined petrol or diesel price.
How we average
Each day, every service station counts once at its latest price as of the end of that day. A price is carried forward for at most 30 days, and the average is taken over every station-day in the period, so a station that reported all period counts more than one that reported for a week.
Towns and areas
Adelaide is its ABS urban area, split into ABS SA4 areas. Outside it, a town is the locality a station sits in; a station in another large city counts in that city as one place.
Which prices count
Prices held for checking, prices a station reported as unavailable and implausible prices are left out. A station’s next report ends its previous price.
Coverage
688 stations had an eligible input price in the period, including carried prices.
Wholesale, margins and the cost of a litre
The terminal gate price is AIP’s weekday price at the Adelaide terminal; AIP publishes the capital-city terminals only. Weekday prices are carried over weekends, and a period’s price is the mean of its calendar days. The margin is the retail average less the terminal gate price. In the cost of a litre, crude oil is Brent in Australian dollars, wholesale is the terminal gate price without GST and excise less crude oil, excise is the ATO rate averaged over the days, GST is one eleventh of the retail price, and the retail difference is the rest.
Sources
FuelRadar: station-day averages, areas and the price cycle, from the prices service stations report to their state’s price service. Australian Institute of Petroleum: terminal gate prices. US Energy Information Administration, via FRED: Brent crude. Federal Reserve, via FRED: the exchange rate. Australian Taxation Office: excise rates. Australian Bureau of Statistics: the urban area, SA4 and locality boundaries.
About these prices
These are averages over the whole period, not today’s prices. Check the station price and its update time before you fill.

What this edition can establish

Not recorded
Carried retail price counts and excluded raw report counts were not retained; their shares are unavailable. The number of stations selling each fuel and litres sold are not recorded, so fuel-market and sales coverage percentages are unavailable.
Saved edition
Saved 15 October 2026 at 9:39 pm, method version 2, PDF publication 7. The fingerprint identifies the saved data, not editorial changes. The PDF publication number does not supply a retained revision history.
Data fingerprint
9ae5208dd5d7d9b3f844d128055482af62fc9d318ffc17d19a7338e0e72156c7

For media

In short
Adelaide reported prices averaged 197.5 c/L for U91 in the September quarter 2026, up 26.4 c/L on the partial June quarter 2026. Crafers–Bridgewater was the cheapest town in Adelaide – Central and Hills for U91 in the September quarter 2026 at 199.0 c/L, 1.5 c/L above Adelaide.
Credit line
Source: FuelRadar Australia, South Australia fuel prices, September quarter 2026, fuelradar.com.au/fuel-price-reports/sa/2026-q3
Media enquiries
Email [email protected]. Figures, graphics and the PDF are free to use in news coverage with the credit line.

South Australia fuel prices, September quarter 2026

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About this edition

How we worked out these figures, and our sources

What the average measures

Which history this uses

Coverage and carry

Wholesale spreads

How we average

Towns and areas

Which prices count

Coverage

Wholesale, margins and the cost of a litre

Sources

About these prices

What this edition can establish

Not recorded

Saved edition

Data fingerprint

In short

Credit line

Media enquiries

This report

This report

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