Suburb fuel prices

Cheap Premium Diesel in St Marys South Australia 5042

5.0c below the South Australia average — St Marys is 18.9c/L under its 30-day average right now — near the bottom of the cycle.

Prices as of 12 min ago AEST · sourced from SA Fuel Pricing Information Scheme

SOUTH AUSTRALIA state averageAll fuelsU91P. DieselP95P98LPG
St Marys · P. DieselBelow the state avg

FILL UP

P. Diesel in St Marys is cheaper than the South Australia average

St Marys sits 5.0c below the South Australia average. St Marys is 18.9c/L under its 30-day average right now — near the bottom of the cycle.

SOUTH AUSTRALIA average

How it compares

  • South Australia state avg184.4c/L-5c/L
  • National avg188.3c/L-8.9c/L
  • Wholesale (TGP)170.9c/L+8.5c/L

Top stations

Cheapest P. Diesel stations in St Marys

Sorted by current P. Diesel price. Tap a station for grades, directions and price age.

  1. U-Go St Marys

    U-Go St Marys

    Cheapest

    1.3 km away · 1129-1131 South Rd & Southern Av

    178.3 c/L

    -1.1 vs avg

  2. OTR Pasadena

    OTR Pasadena

    1.3 km away · 14 Fiveash Dr & Painter St

    179.9 c/L

    +0.5 vs avg

  3. OTR St Marys

    OTR St Marys

    1.0 km away · 1181 South Rd

    179.9 c/L

    +0.5 vs avg

  4. Mobil Sheidow Park

    Mobil Sheidow Park

    9.4 km away · 14 Commercial Rd

    175.5 c/L

    -3.9 vs avg

  5. Mobil Torrensville

    Mobil Torrensville

    9.3 km away · 239 Henley Beach Rd

    177.5 c/L

    -1.9 vs avg

  6. X Convenience Unley

    X Convenience Unley

    6.9 km away · 21 Edmund Av & Duthy St

    177.9 c/L

    -1.5 vs avg

Showing 6 of 58 stations.

Advertisement

30-day spread · P. Diesel

St Marys P. Diesel cycle

St Marys is currently 18.9c/L below its 30-day average — a relatively good time to fill up.

30-day low

178.3c/L

Lowest point in the local spread

30-day average

198.7c/L

30-day high

221.9c/L

Today's average

179.8c/L

178.0200.0222.026 May9 June23 June
Daily averageMin–max spread across St Marys stations

Cheapest P. Diesel right now

  1. 1Mobil Sheidow ParkMobil · 9.4 km away175.5 c/L4.0
  2. 2Mobil TorrensvilleMobil · 9.3 km away177.5 c/L1.0
  3. 3X Convenience UnleyX Convenience · 6.9 km away177.9 c/L7.0
  4. 4U-Go St MarysU-Go · 1.3 km away178.3 c/L1.2
  5. 5X Convenience Brooklyn ParkX Convenience · 9.4 km away178.5 c/L

Source: Reported P. Diesel pump prices across St Marys.

7-day outlook

St Marys 7-day P. Diesel outlook

Rising · +14.1c/L over 7 days

St Marys prices follow the Adelaide cycle, so this outlook takes the Adelaide P. Diesel forecast and adjusts it to St Marys's own price level using 90 days of local history. You can see the Adelaide benchmark alongside the local estimate below.

Adelaide is in the falling phase of its current cycle.

St Marys today (est.)

183.8c/L

Adelaide 186.1c/L · -2.3c/L local

Predicted in 7 days

196.2c/L

7-day range

180.4 – 207.8c/L

179.0194.0209.0WedThuFriSatSunMonTue
Predicted price90% confidence band
See full 30-day forecastHow accurate is this?

All fuel types

Fuel prices in St Marys by type

Low, average and high for each fuel type from the 3 stations tracked here.

FuelLowAvgHighStationsCheapest at
U91149.3c150.7c151.9c3U-Go St Marys
P95163.3c167.0c169.4c3U-Go St Marys
P98171.3c176.0c178.9c3U-Go St Marys
PDSL178.3c179.4c179.9c3U-Go St Marys

Nearby suburbs

Suburbs near St Marys

How St Marys compares to neighbouring areas — cheapest first, delta vs the St Marys average.

  1. Da
    Daw ParkCheapest

    179.1c

    -0.3vs St Marys
  2. Co
    Colonel Light Gardens

    179.1c

    -0.3vs St Marys
  3. Cu
    Cumberland Park

    179.1c

    -0.3vs St Marys
  4. Pa
    Panorama

    179.1c

    -0.3vs St Marys
  5. We
    Westbourne Park

    179.1c

    -0.3vs St Marys
  6. St
    St MarysYou

    179.4c

    0.0vs St Marys
  7. To
    Tonsley

    179.4c

    0.0vs St Marys
  8. Cl
    Clovelly Park

    179.4c

    0.0vs St Marys
  9. Fl
    Flinders University

    179.4c

    0.0vs St Marys
  10. Pa
    Pasadena

    179.4c

    0.0vs St Marys
  11. Be
    Bedford Park

    179.4c

    0.0vs St Marys

At a glance

St Marys fuel prices at a glance

Cheapest P. Diesel
178.3 c/L
Suburb average
179.4 c/L
Price range
1.6c spread
Stations tracked
3
Brands
2
Postcode
5042
Last updated
24 June 2026, 4:37 am AEST

Explore the area

Browse fuel prices around St Marys

Step up to the city and state, compare neighbouring suburbs, or open the live P. Diesel map.

St Marys snapshot

Live P. Diesel prices in St Marys

Today's prices

In St Marys, South Australia, the cheapest U91 today is 149.3c with an area average of 150.7c across 3 listed stations. Other fuels tracked in this suburb include P95 from 163.3c, P98 from 171.3c and PDSL from 178.3c.

How it compares

St Marys is currently 5.0c below the South Australia state average of 184.4c. Open the live fuel map to see how individual stations spread within St Marys.

Compare neighbouring suburbs

Cheaper fuel may be nearby — compare Tonsley (from 178.3c), Clovelly Park (from 178.3c), Flinders University (from 178.3c), Pasadena (from 178.3c) or Bedford Park (from 178.3c) before planning a fill-up.

Brands operating here

2 fuel brands operate stations in St Marys, including On The Run (OTR) and U-Go. Brand loyalty programs and discount apps can shift the cheapest pump by 4–6c/L on any given day.

Frequently asked

St Marys fuel questions

The cheapest Premium Diesel in St Marys is currently at Mobil Sheidow Park for 175.5 c/L.

FuelRadar app

Keep St Marys fuel prices in your pocket

Track St Marys prices, watch the local cycle and get an alert before the next jump — from your phone.

Price-drop alertsWatch the fuel types and suburbs you actually use.
Saved servosKeep regular stations close for a faster fill-or-wait call.
Route-aware savingsCompare price, distance and detour before you drive.
Live nearby mapOpen the cheapest nearby station in seconds.
Download on the App StoreGet it on Google Play
App details
FuelRadar app showing live fuel prices, price alerts and saved routes