South Australia fuel prices, September 2026

Prices from 1 September to 30 September 2026Updated

South Australia U91 average

224.3c/L

+17.0 c/L on August 2026

Adelaide U91
218.8c/L
Rest of South Australia U91
228.8c/L
Diesel average
273.9c/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.

Download the PDF

Report highlights

Quote these with the credit: Source: FuelRadar Australia, South Australia fuel prices, September 2026, fuelradar.com.au/fuel-price-reports/sa/2026-09

  1. Adelaide reported prices averaged 218.8 c/L for U91 in September 2026, up 16.7 c/L on August 2026.

  2. Crafers–Bridgewater was the cheapest town in Adelaide – Central and Hills for U91 in September 2026 at 221.1 c/L, 2.3 c/L above Adelaide.

  3. Since our records began on 13 April 2026, the day of the week made little difference to U91 prices in Adelaide: the cheapest and dearest days were 0.8 c/L apart on average.

  4. Filling a 60-litre tank with U91 in Cowell rather than in Nullarbor (rural) saved $55.38 on average in September 2026.

  5. Independent service stations in South Australia averaged 0.6 c/L more than the major brands for U91 in September 2026, and 4.5 c/L less in Adelaide.

  6. Diesel cost 50.4 c/L more than U91 in Adelaide in September 2026, up from 38.7 c/L in August 2026.

  7. Cowell was South Australia’s cheapest town for U91 in September 2026 at 216.7 c/L, 2.1 c/L below Adelaide.

  8. Adelaide was the cheapest of the 8 capital cities for U91 in September 2026 at 218.8 c/L.

Key points

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

  1. Adelaide was the cheapest of the 8 capital cities for U91 in September 2026, averaging 218.8 c/L.

  2. Wholesale unleaded petrol in Adelaide averaged 215.5 c/L in September 2026, an increase of 21.3 c/L on August 2026.

  3. At 215.5 c/L, wholesale unleaded was the dearest of the 121 months in ten years since AIP's series began in January 2004 (nominal prices).

  4. Wholesale diesel in Adelaide averaged 255.4 c/L in September 2026, up 17.4 c/L from August 2026.

  5. Adelaide petrol prices followed wholesale costs and excise rather than a regular price cycle during September 2026.

  6. A daily peak for U91 in Adelaide reached 234.3 c/L on 22 September 2026, setting a record high since our records began on 13 April 2026.

  7. Cowell was South Australia’s cheapest town for U91 in September 2026 at 216.7 c/L, which was 2.1 c/L below Adelaide.

  8. Filling a 60-litre tank with U91 in Cowell rather than in Nullarbor (rural) saved $55.38 on average in September 2026.

  9. Independent service stations in Adelaide averaged 4.5 c/L less than the major brands for U91 in September 2026.

  10. Diesel cost 50.4 c/L more than U91 in Adelaide in September 2026, up from 38.7 c/L in August 2026.

  11. Regional drivers paid an average of 228.8 c/L for U91 in September 2026, which was 10 c/L more than drivers in Adelaide.

  12. Between 1 July 2026 and 30 September 2026, U91 in Adelaide climbed 74.5 c/L.

Get the free FuelRadar app

Free on iPhone and Android: price alerts, saved stations, the forecast.

Download on the App StoreGet it on Google Play
FuelRadar app Today screen with the fill-up call for Brisbane and the cheapest Unleaded 91 within 15 km
FuelRadar app fuel map with Unleaded 91 prices around Brisbane, each marked Cheap, Average or Pricey

App preview. Prices shown are example captures, not current reports.

Every fuel in South Australia

Adelaide reported prices averaged 218.8 c/L for U91 in September 2026, up 16.7 c/L on August 2026. Across South Australia, U91 averaged 224.3 c/L, up 17.0 c/L on August 2026. Diesel reported prices in Adelaide averaged 269.2 c/L in September 2026, up 28.4 c/L on August 2026. Across South Australia, diesel averaged 273.9 c/L, up 22.8 c/L on August 2026. The other fuels averaged E10 212.9 c/L, P95 238.7 c/L, P98 247.3 c/L and LPG 115.3 c/L.

Unleaded 91+10.0 restDiesel+5.7 restE10+5.1 restPremium 95+8.2 restPremium 98+5.9 restLPG+24.5 rest

Source: FuelRadar (fuelradar.com.au)

Cents a litre. Change is on August 2026. Difference is the rest of the state against Adelaide.

Table view
Average price by fuel, September 2026
FuelSouth AustraliaAdelaideRest of state
Unleaded 91224.3218.8228.8
Diesel273.9269.2274.9
E10212.9211.3216.4
Premium 95238.7235.9244.1
Premium 98247.3244.4250.3
LPG115.3105.9130.4

What makes up a litre in Adelaide

Of the 218.8 c/L U91 average in Adelaide, crude oil was 101.4 c/L, wholesale 40.8 c/L, excise 53.7 c/L, GST 19.9 c/L and the retail difference 3.0 c/L. Of the 269.2 c/L diesel average in Adelaide, crude oil was 101.4 c/L, wholesale 77.1 c/L, excise 53.7 c/L, GST 24.5 c/L and the retail difference 12.5 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

Fuel
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 (4 rows)
What makes up a litre of Unleaded 91, c/L
PeriodCrude oil (Brent, A$)Wholesale: refining, shipping, terminalExciseGSTRetail differenceRetail price
September 2026Dearest since our records began101.440.853.719.93.0218.8
August 202680.743.252.618.47.2202.1
2025 averageWholesale side only67.529.651.1———
Cheapest: June 202676.644.720.614.20.4156.5
Download

Month by month, U91

Adelaide's daily U91 average went from 201.8 c/L on 1 September to 232.7 c/L on 30 September, and diesel from 247.4 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.

U91 average by month, September 2026
AreaMonth
South Australia224.3
Adelaide218.8
Rest of South Australia228.8
Adelaide NorthArea217.7
Adelaide WestArea218.7
Adelaide SouthArea219.0
Adelaide – Central and HillsArea221.1

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 month.

Month by month, diesel

Show diesel month by month
Diesel average by month, September 2026
AreaMonth
South Australia273.9
Adelaide269.2
Rest of South Australia274.9
Adelaide SouthArea267.7
Adelaide – Central and HillsArea267.9
Adelaide NorthArea268.7
Adelaide WestArea269.6

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 month.

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.
PeriodDays used / windowRetail daily meanTGP, same daysGross spread
September 20261 to 30 Sept 2026; 8 carried TGP days. Gaps may occur within this range.30 / 30218.8215.53.3
August 20261 to 31 Aug 2026; 10 carried TGP days. Gaps may occur within this range.31 / 31202.1194.27.9

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.
PeriodDays used / windowRetail daily meanTGP, same daysGross spread
September 20261 to 30 Sept 2026; 8 carried TGP days. Gaps may occur within this range.30 / 30269.1255.413.7
August 20261 to 31 Aug 2026; 10 carried TGP days. Gaps may occur within this range.31 / 31241.3238.03.3

Worked out the same way as the table above.

Market trends this year

The Adelaide terminal gate price averaged 215.5 c/L for unleaded and 255.4 c/L for diesel, up 21.3 c/L and up 17.4 c/L on August 2026. Brent crude averaged US$114.2 a barrel, or 101.4 c/L in Australian dollars, with the Australian dollar at an average of 71.15 US cents.

Retail, terminal gate and crude oil prices this year

Chart
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
DateU91, AdelaideDiesel, AdelaideUnleaded terminal gate price
30 Sept232.7288.5229.1
29 Sept233.0288.7228.6
28 Sept233.1288.6229.3
27 Sept233.2288.6—
26 Sept233.6288.7—
25 Sept233.6289.4229.5
24 Sept234.2290.2230.2
23 Sept234.2289.3230.3
22 Sept234.3288.9229.1
21 Sept231.7283.2228.0
20 Sept230.6281.7—
19 Sept230.0281.2—
18 Sept229.0280.0224.8
17 Sept224.5273.7221.7
16 Sept219.1268.0218.8
15 Sept217.1266.7214.1
14 Sept213.6263.0211.9
13 Sept208.5257.0—
12 Sept208.5256.5—
11 Sept208.1255.8210.1
10 Sept206.1253.7207.9
9 Sept205.7253.1205.3
8 Sept205.4252.4202.8
7 Sept205.1251.6201.1
6 Sept204.3250.7—
5 Sept204.2250.6—
4 Sept203.1249.9198.7
3 Sept202.5248.4196.6
2 Sept201.8247.4195.5
1 Sept201.8247.4194.8
31 Aug201.9247.5195.3
30 Aug202.2247.7—
29 Aug202.2248.1—
28 Aug202.2248.0195.5
27 Aug202.9248.2196.5
26 Aug203.3248.5196.6
25 Aug203.4249.4196.4
24 Aug203.6249.1196.1
23 Aug203.9248.1—
22 Aug203.4247.9—
21 Aug203.3247.9195.4
20 Aug201.8244.6194.7
19 Aug200.9243.6194.2
18 Aug199.7243.0193.4
17 Aug199.1241.3192.8
16 Aug198.1240.3—
15 Aug197.6239.5—
14 Aug197.0238.2191.1
13 Aug197.3234.2189.8
12 Aug198.8232.2189.8
11 Aug200.5232.9191.0
10 Aug203.9236.4192.8
9 Aug206.6238.1—
8 Aug207.5238.5—
7 Aug208.0238.9196.5
6 Aug209.0239.6198.4
5 Aug208.0238.6198.7
4 Aug205.9236.8198.2
3 Aug201.2233.6203.5
2 Aug196.3229.8—
1 Aug196.1229.3—
31 July194.4227.7183.8
30 July193.6227.3184.2
29 July192.5226.0183.8
28 July192.0225.7183.0
27 July189.4223.8180.8
26 July187.1219.9—
25 July185.3219.0—
24 July182.2216.6177.6
23 July179.7214.8174.5
22 July176.5211.6173.2
21 July174.1208.0170.2
20 July171.3205.3168.5
19 July169.3202.6—
18 July168.9201.5—
17 July167.6199.5166.5
16 July165.4196.4164.2
15 July163.8192.6161.7
14 July163.2189.5160.3
13 July163.3187.9160.3
12 July163.1186.5—
11 July163.1185.6—
10 July162.9184.9160.6
9 July162.6184.0161.9
8 July162.3184.1162.8
7 July163.2184.5163.8
6 July164.2185.7164.2
5 July165.5186.0—
4 July165.5186.3—
3 July165.1186.2163.7
2 July160.7182.2163.1
1 July158.2178.5162.3
30 June154.6175.0146.8
29 June148.7171.0146.8
28 June148.6171.0—
27 June148.5172.3—
26 June148.9174.0147.8
25 June149.8177.6148.3
24 June150.5179.2148.5
23 June151.3181.2150.6
22 June152.4183.4151.3
21 June153.6185.7—
20 June154.3186.4—
19 June155.0187.7153.5
18 June156.4190.7156.7
17 June157.1194.0159.1
16 June158.0196.0161.4
15 June158.5198.2161.2
14 June158.2199.5—
13 June158.4199.9—
12 June158.5199.9160.5
11 June158.4200.0159.9
10 June158.4200.2158.9
9 June158.6200.7158.6
8 June159.1201.1158.7
7 June159.1201.6—
6 June159.3201.8—
5 June159.4201.8159.5
4 June160.6202.6159.6
3 June162.7204.8161.8
2 June167.8209.0164.2
1 June168.8210.4166.5
31 May169.8211.8—
30 May170.3212.9—
29 May170.6213.3169.5
28 May172.2215.5172.2
27 May173.3216.9175.2
26 May175.5219.6178.8
25 May176.5221.5180.1
24 May176.9222.7—
23 May176.8222.9—
22 May176.7223.1180.7
21 May177.2223.9180.2
20 May176.7224.9178.4
19 May176.7225.3175.1
18 May175.2225.5173.1
17 May175.0225.9—
16 May183.5226.1—
15 May181.6226.2172.0
14 May174.3226.7172.2
13 May175.0228.3173.0
12 May176.2230.0175.6
11 May177.7232.6178.1
10 May179.4233.2—
9 May180.3235.8—
8 May180.3236.1181.2
7 May179.8237.1182.0
6 May179.3237.6181.5
5 May177.8238.3182.5
4 May176.8238.7182.4
3 May175.8239.1—
2 May175.0239.4—
1 May175.0239.5182.4
30 Apr174.9240.4181.4
29 Apr174.8242.1180.0
28 Apr174.9243.2179.1
27 Apr175.3246.7179.1
26 Apr175.8246.6—
25 Apr176.8248.2—
24 Apr177.1248.9179.4
23 Apr177.8252.9181.6
22 Apr180.9261.3183.6
21 Apr187.0274.1186.3
20 Apr191.3283.2187.6
19 Apr196.1290.6—
18 Apr198.1291.3—
17 Apr199.8291.4190.4
16 Apr204.3295.6191.8
15 Apr209.5300.4195.7
14 Apr216.3314.6198.7
13 Apr217.3316.9201.3
10 Apr——205.4
9 Apr——208.6
8 Apr——207.8
7 Apr——203.8
6 Apr——203.8
3 Apr——204.6
2 Apr——205.3
1 Apr——205.9
31 Mar——230.9
30 Mar——242.7
27 Mar——247.3
26 Mar——249.8
25 Mar——248.5
24 Mar——244.3
23 Mar——242.2
20 Mar——237.2
19 Mar——234.6
18 Mar——230.0
17 Mar——224.4
16 Mar——218.8
13 Mar——210.4
12 Mar——204.9
11 Mar——193.9
10 Mar——188.4
9 Mar——174.8
6 Mar——168.3
5 Mar——162.0
4 Mar——159.6
3 Mar——157.5
2 Mar——156.9
27 Feb——156.0
26 Feb——155.5
25 Feb——154.7
24 Feb——153.1
23 Feb——152.0
20 Feb——151.8
19 Feb——152.4
18 Feb——152.9
17 Feb——153.6
16 Feb——154.0
13 Feb——153.8
12 Feb——153.2
11 Feb——152.6
10 Feb——152.3
9 Feb——152.2
6 Feb——152.1
5 Feb——152.3
4 Feb——152.6
3 Feb——153.2
2 Feb——153.2
30 Jan——152.5
29 Jan——152.9
28 Jan——153.3
27 Jan——153.4
26 Jan——153.4
23 Jan——153.4
22 Jan——153.5
21 Jan——153.7
20 Jan——153.5
19 Jan——153.6
16 Jan——153.1
15 Jan——152.5
14 Jan——152.3
13 Jan——152.2
12 Jan——152.2
9 Jan——152.7
8 Jan——153.3
7 Jan——153.8
6 Jan——154.3
5 Jan——154.5
2 Jan——154.7
1 Jan——154.7
Download

Adelaide against the rest of South Australia

Adelaide averaged 218.8 c/L for U91 and the rest of South Australia 228.8 c/L, so reported prices in the rest of South Australia averaged 10.0 c/L more than Adelaide. Adelaide averaged 269.2 c/L for diesel and the rest of South Australia 274.9 c/L, so reported prices in the rest of South Australia averaged 5.7 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 (30 rows)
U91 daily averages, Adelaide and Rest of South Australia, 1 Sept to 30 Sept
DateAdelaide (c/L)Rest of South Australia (c/L)
30 Sept232.7244.2
29 Sept233.0244.2
28 Sept233.1244.2
27 Sept233.2244.2
26 Sept233.6244.3
25 Sept233.6244.3
24 Sept234.2244.1
23 Sept234.2243.5
22 Sept234.3242.2
21 Sept231.7240.3
20 Sept230.6238.9
19 Sept230.0238.2
18 Sept229.0237.0
17 Sept224.5232.6
16 Sept219.1228.1
15 Sept217.1224.9
14 Sept213.6221.9
13 Sept208.5219.0
12 Sept208.5218.9
11 Sept208.1218.1
10 Sept206.1216.1
9 Sept205.7215.3
8 Sept205.4214.7
7 Sept205.1214.1
6 Sept204.3213.5
5 Sept204.2213.7
4 Sept203.1213.3
3 Sept202.5213.3
2 Sept201.8213.3
1 Sept201.8213.4
Download

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 stayed at 53.7 c/L for petrol and diesel through September 2026.

Fuel excise, September 2026
Petrol and diesel exciseRate (c/L, before GST)Change
In force on 1 September 202653.7—
Average over the days of 1 September to 30 September 202653.70—

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 218.8 c/L and Canberra the dearest at 230.4 c/L. Adelaide ranked third cheapest of the 8 capital cities for diesel; Perth was the cheapest at 262.9 c/L and Canberra the dearest at 282.6 c/L.

Every capital city by average U91 price, September 2026
CapitalMonth
AdelaideThis report · Cheapest capital218.8
Perth220.1
Melbourne220.3
Brisbane222.3
Sydney222.6
Hobart227.3
Darwin229.7
CanberraDearest capital230.4

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 2026
CapitalMonth
PerthCheapest capital262.9
Sydney266.3
AdelaideThis report269.2
Melbourne269.6
Brisbane271.8
Hobart272.5
Darwin276.3
CanberraDearest capital282.6

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.

Adelaide by area

Inside Adelaide, Adelaide North was the cheapest area for U91 at 217.7 c/L and Adelaide – Central and Hills the dearest at 221.1 c/L, a spread of 3.4 c/L.

  1. Adelaide North217.7 (lowest)
  2. Adelaide West218.7
  3. Adelaide South219.0
  4. Adelaide – Central and Hills221.1

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 view
Adelaide areas by average price, September 2026
Area (ABS SA4)U91Diesel
Adelaide North217.7268.7
Adelaide West218.7269.6
Adelaide South219.0267.7
Adelaide – Central and Hills221.1267.9

Regional towns cheaper than Adelaide, U91

Regional towns with a U91 average below Adelaide’s, September 2026
TownMonthAgainst Adelaide
Cowell216.7−2.1
Victor Harbor217.7−1.1
McLaren Vale218.4−0.4

Cents a litre, cheapest first. Adelaide’s U91 average was 218.8 c/L. A town’s margin is against Adelaide’s terminal gate price. Period-average margins are omitted here: comparable daily inputs and weights are not retained for these rows.

Regional towns ranked, U91

Cowell was the cheapest town we ranked for U91 at 216.7 c/L, 2.1 c/L below Adelaide. Nullarbor (rural) was the dearest at 309.0 c/L, 90.2 c/L above Adelaide. 3 of the 60 towns we ranked averaged less than Adelaide for U91. Cowell was the cheapest regional town for diesel at 261.4 c/L and Nullarbor (rural) the dearest at 344.6 c/L, a spread of 83.2 c/L.

Cowell216.7▼ −2.1 v AdelaideVictor Harbor217.7▼ −1.1 v AdelaideMcLaren Vale218.4▼ −0.4 v AdelaideAngle Vale219.3▲ +0.5 v AdelaideRoseworthy219.8▲ +1.0 v AdelaideWaikerie220.0▲ +1.2 v AdelaideBarmera220.1▲ +1.3 v AdelaideNuriootpa220.1▲ +1.3 v AdelaideTintinara220.1▲ +1.3 v AdelaideGawler220.4▲ +1.6 v AdelaideMount Gambier220.4▲ +1.6 v AdelaideBerri220.5▲ +1.7 v AdelaideStrathalbyn220.9▲ +2.1 v AdelaideAngaston221.1▲ +2.3 v AdelaideCrafers–Bridgewater221.1▲ +2.3 v AdelaideVirginia221.5▲ +2.7 v AdelaideBalaklava221.6▲ +2.8 v AdelaideKeith221.7▲ +2.9 v AdelaidePort Augusta222.7▲ +3.9 v AdelaideEdithburgh223.2▲ +4.4 v AdelaideKapunda223.8▲ +5.0 v AdelaideLameroo224.2▲ +5.4 v AdelaideMeadows224.2▲ +5.4 v AdelaidePort Wakefield224.2▲ +5.4 v AdelaideBordertown224.4▲ +5.6 v AdelaideMount Barker224.6▲ +5.8 v AdelaideLoxton225.2▲ +6.4 v AdelaideTailem Bend225.4▲ +6.6 v AdelaideMaitland225.5▲ +6.7 v AdelaideGladstone226.0▲ +7.2 v AdelaideMannum226.2▲ +7.4 v AdelaideLaura227.0▲ +8.2 v AdelaideClare227.3▲ +8.5 v AdelaideEudunda227.3▲ +8.5 v AdelaideMurray Bridge227.4▲ +8.6 v AdelaidePort Lincoln227.4▲ +8.6 v AdelaideWilmington227.5▲ +8.7 v AdelaideKadina227.7▲ +8.9 v AdelaideJamestown227.9▲ +9.1 v AdelaideBurra228.0▲ +9.2 v AdelaideYorketown228.0▲ +9.2 v AdelaideMoonta228.1▲ +9.3 v AdelaideYunta (rural)228.1▲ +9.3 v AdelaideKingston SE228.2▲ +9.4 v AdelaideRenmark228.7▲ +9.9 v AdelaideWarnertown (rural)228.8▲ +10.0 v AdelaidePort Pirie229.0▲ +10.2 v AdelaideWhyalla229.5▲ +10.7 v AdelaidePort Vincent229.7▲ +10.9 v AdelaideNaracoorte229.8▲ +11.0 v AdelaideWallaroo229.8▲ +11.0 v AdelaideCeduna229.9▲ +11.1 v AdelaideGoolwa230.0▲ +11.2 v AdelaideTumby Bay231.0▲ +12.2 v AdelaideStreaky Bay232.4▲ +13.6 v AdelaideCummins237.2▲ +18.4 v AdelaideKingscote243.2▲ +24.4 v AdelaideCoober Pedy252.5▲ +33.7 v AdelaideHawker252.5▲ +33.7 v AdelaideNullarbor (rural)309.0▲ +90.2 v Adelaide

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 view
South Australia regional towns by average U91 price, September 2026
TownAverageAgainst Adelaide
Cowell216.7−2.1
Victor Harbor217.7−1.1
McLaren Vale218.4−0.4
Angle Vale219.3+0.5
Roseworthy219.8+1.0
Waikerie220.0+1.2
Barmera220.1+1.3
Nuriootpa220.1+1.3
Tintinara220.1+1.3
Gawler220.4+1.6
Mount Gambier220.4+1.6
Berri220.5+1.7
Strathalbyn220.9+2.1
Angaston221.1+2.3
Crafers–Bridgewater221.1+2.3
Virginia221.5+2.7
Balaklava221.6+2.8
Keith221.7+2.9
Port Augusta222.7+3.9
Edithburgh223.2+4.4
Kapunda223.8+5.0
Lameroo224.2+5.4
Meadows224.2+5.4
Port Wakefield224.2+5.4
Bordertown224.4+5.6
Mount Barker224.6+5.8
Loxton225.2+6.4
Tailem Bend225.4+6.6
Maitland225.5+6.7
Gladstone226.0+7.2
Mannum226.2+7.4
Laura227.0+8.2
Clare227.3+8.5
Eudunda227.3+8.5
Murray Bridge227.4+8.6
Port Lincoln227.4+8.6
Wilmington227.5+8.7
Kadina227.7+8.9
Jamestown227.9+9.1
Burra228.0+9.2
Yorketown228.0+9.2
Moonta228.1+9.3
Yunta (rural)228.1+9.3
Kingston SE228.2+9.4
Renmark228.7+9.9
Warnertown (rural)228.8+10.0
Port Pirie229.0+10.2
Whyalla229.5+10.7
Port Vincent229.7+10.9
Naracoorte229.8+11.0
Wallaroo229.8+11.0
Ceduna229.9+11.1
Goolwa230.0+11.2
Tumby Bay231.0+12.2
Streaky Bay232.4+13.6
Cummins237.2+18.4
Kingscote243.2+24.4
Coober Pedy252.5+33.7
Hawker252.5+33.7
Nullarbor (rural)309.0+90.2

Regional towns ranked, diesel

Cowell261.4▼ −7.8 v AdelaideBerri261.7▼ −7.5 v AdelaideTintinara262.6▼ −6.6 v AdelaideKeith263.7▼ −5.5 v AdelaideEdithburgh263.9▼ −5.3 v AdelaideMount Gambier264.5▼ −4.7 v AdelaideBarmera265.8▼ −3.4 v AdelaideBalaklava266.5▼ −2.7 v AdelaideVictor Harbor266.5▼ −2.7 v AdelaideLameroo267.4▼ −1.8 v AdelaideRoseworthy267.4▼ −1.8 v AdelaideBordertown267.5▼ −1.7 v AdelaideMeningie268.1▼ −1.1 v AdelaidePort Vincent268.1▼ −1.1 v AdelaideRenmark268.1▼ −1.1 v AdelaideWilmington268.1▼ −1.1 v AdelaideTailem Bend268.3▼ −0.9 v AdelaideYorketown268.3▼ −0.9 v AdelaidePort Augusta West (rural)268.7▼ −0.5 v AdelaideGladstone269.2● 0.0 v AdelaideArdrossan269.7▲ +0.5 v AdelaideBurra269.8▲ +0.6 v AdelaidePort Augusta270.4▲ +1.2 v AdelaideAngaston270.7▲ +1.5 v AdelaideLoxton271.3▲ +2.1 v AdelaidePeterborough271.4▲ +2.2 v AdelaideBooleroo Centre271.8▲ +2.6 v AdelaideCrafers–Bridgewater271.8▲ +2.6 v AdelaideEudunda271.8▲ +2.6 v AdelaideYunta (rural)271.8▲ +2.6 v AdelaideLaura272.1▲ +2.9 v AdelaideMount Barker272.1▲ +2.9 v AdelaidePort Wakefield272.2▲ +3.0 v AdelaideJamestown272.6▲ +3.4 v AdelaideKimba272.9▲ +3.7 v AdelaideStrathalbyn273.1▲ +3.9 v AdelaideMcLaren Vale273.4▲ +4.2 v AdelaideTumby Bay273.4▲ +4.2 v AdelaideTwo Wells (rural)273.4▲ +4.2 v AdelaideClare273.8▲ +4.6 v AdelaideKadina273.8▲ +4.6 v AdelaideCeduna274.2▲ +5.0 v AdelaidePort Lincoln274.2▲ +5.0 v AdelaidePinnaroo274.4▲ +5.2 v AdelaideStreaky Bay274.6▲ +5.4 v AdelaideRobe275.8▲ +6.6 v AdelaideMeadows276.0▲ +6.8 v AdelaideMurray Bridge276.0▲ +6.8 v AdelaideCummins276.2▲ +7.0 v AdelaideWudinna276.3▲ +7.1 v AdelaideMoonta276.6▲ +7.4 v AdelaidePort Pirie276.7▲ +7.5 v AdelaideNaracoorte276.9▲ +7.7 v AdelaideLock (rural)277.1▲ +7.9 v AdelaideWhyalla277.2▲ +8.0 v AdelaideWarnertown (rural)277.3▲ +8.1 v AdelaideGoolwa277.4▲ +8.2 v AdelaideKingston SE277.6▲ +8.4 v AdelaideKingscote285.9▲ +16.7 v AdelaideHawker292.3▲ +23.1 v AdelaideLyndhurst (rural)300.1▲ +30.9 v AdelaideCoober Pedy305.9▲ +36.7 v AdelaideNullarbor (rural)344.6▲ +75.4 v Adelaide

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; 117 smaller places were left out. The cheapest station’s figure is its own average over the period.

Table view
South Australia regional towns by average diesel price, September 2026
TownAverageAgainst Adelaide
Cowell261.4−7.8
Berri261.7−7.5
Tintinara262.6−6.6
Keith263.7−5.5
Edithburgh263.9−5.3
Mount Gambier264.5−4.7
Barmera265.8−3.4
Balaklava266.5−2.7
Victor Harbor266.5−2.7
Lameroo267.4−1.8
Roseworthy267.4−1.8
Bordertown267.5−1.7
Meningie268.1−1.1
Port Vincent268.1−1.1
Renmark268.1−1.1
Wilmington268.1−1.1
Tailem Bend268.3−0.9
Yorketown268.3−0.9
Port Augusta West (rural)268.7−0.5
Gladstone269.20.0
Ardrossan269.7+0.5
Burra269.8+0.6
Port Augusta270.4+1.2
Angaston270.7+1.5
Loxton271.3+2.1
Peterborough271.4+2.2
Booleroo Centre271.8+2.6
Crafers–Bridgewater271.8+2.6
Eudunda271.8+2.6
Yunta (rural)271.8+2.6
Laura272.1+2.9
Mount Barker272.1+2.9
Port Wakefield272.2+3.0
Jamestown272.6+3.4
Kimba272.9+3.7
Strathalbyn273.1+3.9
McLaren Vale273.4+4.2
Tumby Bay273.4+4.2
Two Wells (rural)273.4+4.2
Clare273.8+4.6
Kadina273.8+4.6
Ceduna274.2+5.0
Port Lincoln274.2+5.0
Pinnaroo274.4+5.2
Streaky Bay274.6+5.4
Robe275.8+6.6
Meadows276.0+6.8
Murray Bridge276.0+6.8
Cummins276.2+7.0
Wudinna276.3+7.1
Moonta276.6+7.4
Port Pirie276.7+7.5
Naracoorte276.9+7.7
Lock (rural)277.1+7.9
Whyalla277.2+8.0
Warnertown (rural)277.3+8.1
Goolwa277.4+8.2
Kingston SE277.6+8.4
Kingscote285.9+16.7
Hawker292.3+23.1
Lyndhurst (rural)300.1+30.9
Coober Pedy305.9+36.7
Nullarbor (rural)344.6+75.4

Other fuels: cheapest and dearest towns

Cheapest and dearest towns for the other fuels, September 2026
FuelCheapest town (c/L)Dearest town (c/L)
E10Mount Gambier 212.7Barmera 213.9
Premium 95McLaren Vale 235.0Nullarbor (rural) 319.2
Premium 98Tintinara 236.8Coober Pedy 278.9
LPGGawler 108.9Mount Gambier 122.4

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

Regional centres, U91

Victor Harbor was the cheapest of the 10 regional centres we ranked for U91 at 217.7 c/L, and Whyalla the dearest at 229.5 c/L. One of them averaged less than Adelaide.

Regional centres ranked by their U91 average, September 2026
CentreMonthAgainst Adelaide
Victor Harbor217.7−1.1
Gawler220.4+1.6
Mount Gambier220.4+1.6
Crafers–Bridgewater221.1+2.3
Port Augusta222.7+3.9
Mount Barker224.6+5.8
Murray Bridge227.4+8.6
Port Lincoln227.4+8.6
Port Pirie229.0+10.2
Whyalla229.5+10.7

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 217.7 c/L for U91, 1.1 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 218.7 c/L for U91, 0.1 c/L below Adelaide, and was cheaper than Adelaide in 3 of 6 months since our records began on 13 April 2026. Adelaide South averaged 219.0 c/L for U91, 0.2 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 221.1 c/L for U91, 2.3 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: September 2026, since our records began on 13 April 2026, and each month
AreaMonthAgainst AdelaideYear so farMonths cheaper
Adelaide North217.7−1.1−0.96 of 6
Adelaide West218.7−0.1+0.13 of 6
Adelaide South219.0+0.2+0.40 of 6
Adelaide – Central and Hills221.1+2.3+1.60 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

Angle Vale was the cheapest town in Adelaide North for U91 at 219.3 c/L and Virginia the dearest at 221.5 c/L. Crafers–Bridgewater was the cheapest town in Adelaide – Central and Hills for U91 at 221.1 c/L and Mount Barker the dearest at 224.6 c/L. Of the suburbs and towns we ranked, the widest spread was in Outback South Australia: Cowell at 216.7 c/L to Nullarbor at 309.0 c/L, a gap of 92.3 c/L.

The cheapest and dearest suburb or town in each ABS SA4 area, September 2026
AreaCheapest suburb or town
Adelaide NorthAdelaide areaKlemzig212.3 c/L
Adelaide SouthAdelaide areaSt Marys214.5 c/L
Adelaide WestAdelaide areaPort Adelaide214.4 c/L
Adelaide – Central and HillsAdelaide areaNailsworth213.6 c/L
Barossa – Yorke – Mid NorthNuriootpa220.1 c/L
Outback South AustraliaCowell216.7 c/L
South Australia South EastHayborough218.2 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 193.1 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
FuelSouth AustraliaAdelaideRest of South Australia
U91193.1185.4199.6
Diesel239.2227.8241.9

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
TownAverageAgainst Adelaide
Angle Vale185.5+0.1
Barmera185.9+0.5
Gawler186.2+0.8
Roseworthy186.2+0.8
Crafers–Bridgewater187.1+1.7
Nuriootpa187.5+2.1
Virginia187.5+2.1
Strathalbyn188.0+2.6
Mount Gambier188.9+3.5
Mount Barker190.0+4.6

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

Dearest towns since our records began on 13 April 2026, U91
TownAverageAgainst Adelaide
Nullarbor (rural)283.1+97.7
Coober Pedy240.5+55.1
Hawker218.3+32.9
Kingscote217.4+32.0
Streaky Bay210.6+25.2
Cummins210.5+25.1
Ceduna204.7+19.3
Goolwa203.5+18.1
Tumby Bay203.2+17.8
Moonta202.0+16.6

The day of the week to buy U91

Since our records began on 13 April 2026, Wednesday has been the cheapest day to buy U91 in Adelaide and Saturday the dearest, 0.8 c/L apart on average.

The cheapest and dearest day of the week, and how far apart they were on average
PlaceCheapest / dearest, month
Adelaide—
GawlerRegional centre—
Mount BarkerRegional centre—
Mount GambierRegional centre—
WhyallaRegional centre—
Crafers–BridgewaterRegional centre—
Murray BridgeRegional centre—
Port AugustaRegional centre—
Port LincolnRegional centre—
Port PirieRegional centre—
Victor HarborRegional centre—

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 Cowell rather than Nullarbor (rural) saved $55.38 on average in September 2026. In Cowell the same tank cost $1.26 less than in Adelaide. At Costco Kilburn in Kilburn, the cheapest station we ranked, it cost $10.56 less than at the state average.

Differences of the published averages, September 2026
ComparisonCheaperDearerA tank
Cheapest and dearest townCowell216.7 c/LNullarbor (rural)309.0 c/L$55.38
Cheapest and dearest regional centreVictor Harbor217.7 c/LWhyalla229.5 c/L$7.08
Cheapest town and AdelaideCowell216.7 c/LAdelaide218.8 c/L$1.26
Cheapest station and the state averageCostco Kilburn206.7 c/LSouth Australia224.3 c/L$10.56

Towns that moved most on August 2026, U91

Port Vincent rose most on August 2026, up 23.5 c/L to 229.7 c/L, and no town we ranked fell.

Towns that moved most on August 2026, U91
TownMonthChange
Port VincentRose229.7+23.5
BurraRose228.0+22.1
HawkerRose252.5+22.0
BalaklavaRose221.6+20.2
Streaky BayRose232.4+20.1

Independents and the major brands, U91

Independent service stations averaged 224.7 c/L for U91 and the major brands 224.1 c/L, 0.6 c/L more at the independents; in Adelaide the gap was 4.5 c/L. Of the brands with five stations or more, U-Go averaged least at 212.1 c/L and Mogas most at 237.5 c/L.

Station-day averages, September 2026
WhereMajor brandsIndependentsDifference
South Australia224.1224.7+0.6
Adelaide219.9215.4−4.5
U-GoIndependent—212.1—
SoloIndependent—213.1—
X ConvenienceIndependent—217.2—
UnitedMajor brand217.6——
LibertyIndependent—219.3—
CaltexMajor brand221.8——
On The Run (OTR)Major brand222.5——
AM/PMIndependent—222.6—
Reddy ExpressMajor brand224.7——
AmpolMajor brand225.1——
ShellMajor brand226.3——
BPMajor brand228.2——
PerrysIndependent—228.3—
MobilMajor brand230.4——
IndependentIndependent—232.1—
MogasIndependent—237.5—

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 206.7 c/L, and Pink Roadhouse in Oodnadatta the dearest at 333.8 c/L.

619 stations with a price on half the days or more, September 2026
StationPlaceAverage
Costco KilburnCostcoKilburn206.7
United Melrose ParkUnitedMelrose Park210.0
Liberty Clarence GardensLibertyClarence Gardens210.3
U-Go St MarysU-GoSt Marys210.5
U-Go ClearviewU-GoEnfield210.7
United PoorakaUnitedPooraka210.7
Ampol Foodary EdwardstownAmpolEdwardstown210.8
X Convenience Gepps CrossX ConvenienceGepps Cross211.0
Solo Blair AtholSoloBlair Athol211.9
X Convenience KlemzigX ConvenienceKlemzig212.0

Dearest service stations, U91

619 stations with a price on half the days or more, September 2026
StationPlaceAverage
Pink RoadhouseIndependentOodnadatta333.8
Nullarbor RoadhouseMobilNullarbor311.5
Border Village RoadhouseBPNullarbor307.1
Leigh Creek MotorsPerrysLeigh Creek284.6
Marla Travellers RestBPMarla274.9
Arkaroola Wilderness SanctuaryMogasArkaroola Village273.4
Cadney Homestead RoadhouseMobilTieyon273.0
Smoky Bay General StoreIndependentSmoky Bay262.0
Chris's Mechanical ServicesIndependentHawker258.5
Cooke's Outback MotorsIndependentCopley258.3

Diesel against U91

Diesel cost 50.4 c/L more than U91 in Adelaide, against 38.7 c/L on August 2026. Among the towns, the gap was narrowest in Nullarbor (rural) at 35.6 c/L and widest in McLaren Vale at 55.0 c/L.

How much more diesel cost than U91, September 2026
WhereDiesel less U91
Adelaide50.4
South Australia49.6
Rest of South Australia46.1
Nullarbor (rural)Narrowest gap35.6
Port VincentNarrowest gap38.4
CumminsNarrowest gap39.0
RenmarkNarrowest gap39.4
HawkerNarrowest gap39.8
McLaren ValeWidest gap55.0
Coober PedyWidest gap53.4
StrathalbynWidest gap52.2
MeadowsWidest gap51.8
Crafers–BridgewaterWidest gap50.7

Crude oil and the dollar

Brent crude averaged US$114.2 a barrel in September 2026, against US$85.4 in June 2026.

Brent crude oil and the Australian dollar, September 2026 and the periods before
PeriodBrent, US$ a barrelUS$ per A$Brent, A$ c/L
September 2026114.20.7115101.4
August 202691.10.710380.7
July 202683.80.697176.2
June 202685.40.702576.6

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 686 distinct stations with eligible input prices, including carried prices, over 60,455 station–fuel–days across published fuels. Our price records begin on 13 April 2026.

What the figures cover, September 2026
CoverageFigure
Service stations listed705
Stations with an eligible input price686
Station–fuel–days counted (published fuels)60,455
Days covered1 September 2026 to 30 September 2026
Station-price records used here begin13 April 2026
Towns ranked for U91120 left out: too few steady stations60

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 periodDistinct stationsStation–fuel–daysCalendar days
U91, September 20261 to 30 Sept 202662718,42530
U91, August 20261 to 31 Aug 202662419,30131
E10, September 20261 to 30 Sept 2026481,42630
E10, August 20261 to 31 Aug 2026481,48831
DSL, September 20261 to 30 Sept 202637110,70630
DSL, August 20261 to 31 Aug 202638311,51131
P95, September 20261 to 30 Sept 202635810,55630
P95, August 20261 to 31 Aug 202635510,97031
P98, September 20261 to 30 Sept 202654816,11430
P98, August 20261 to 31 Aug 202654316,74031
LPG, September 20261 to 30 Sept 20261213,22830
LPG, August 20261 to 31 Aug 20261163,35531

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

  1. 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.

  2. 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.

  3. 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.

  4. 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.

  5. 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.

  6. 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.

  7. 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.

  8. Coverage

    686 stations had an eligible input price in the period, including carried prices.

  9. 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.

  10. 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.

  11. 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

  1. 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.

  2. Saved edition

    Saved 15 October 2026 at 9:36 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.

  3. Data fingerprint

    21b1b6a601441340c0779f941a356b26d48aa0971909c1da0880b155d66492fc

For media

  1. In short

    Adelaide reported prices averaged 218.8 c/L for U91 in September 2026, up 16.7 c/L on August 2026. Crafers–Bridgewater was the cheapest town in Adelaide – Central and Hills for U91 in September 2026 at 221.1 c/L, 2.3 c/L above Adelaide.

  2. Credit line

    Source: FuelRadar Australia, South Australia fuel prices, September 2026, fuelradar.com.au/fuel-price-reports/sa/2026-09

  3. Media enquiries

    Email [email protected]. Figures, graphics and the PDF are free to use in news coverage with the credit line.