Don't get pumped.
As of 22 October 2026, the cheapest Unleaded Petrol in South Australia is 215.4c per litre at U-Go, St Marys — versus the South Australia average of 234.0c (8.4c below the national average of 242.4c). Across 256 stations, Unleaded Petrol ranges from 215.4c to 293.9c, so filling a 50-litre tank at the cheapest station saves about $9.30 over the state average. Over the past week the SA average has fallen 4.9c.
Compare Unleaded Petrol across 256 stations in South Australia. Updated 12:49 PM, 22 Oct 2026.
Over the past 83 days, Unleaded Petrol in South Australia has averaged 228.1c per litre, peaking at 247.0c on 12 October and bottoming out at 195.8c on 31 July — a range of 51.2c. Over the past week the SA average has fallen 4.9c. Timing a fill-up around that range matters: on a 50-litre tank, filling at the period low instead of the peak saves $25.60.
| Month | Average Unleaded Petrol |
|---|---|
| April 2026 | 190.3c |
| May 2026 | 186.3c |
| August 2026 | 205.6c |
| September 2026 | 224.1c |
| October 2026 | 240.0c |
The cheapest Unleaded Petrol price in South Australia right now is 215.4c per litre, across 256 stations tracked. The cheapest suburb right now is Edwardstown at a 220.2c average across 2 stations. Filling a 50-litre tank at the cheapest station instead of a station charging the state average of 234.0c saves $9.30. See the live cheapest-stations list on this page for the exact station, address and suburb. Prices update twice daily from the official state government feed, so the cheapest station can change between the morning and afternoon updates — check again before you drive.
The current South Australia average for Unleaded Petrol is 234.0c per litre — 8.4c below the national average of 242.4c. Prices at individual stations range from 215.4c to 293.9c, a spread of 78.5c that shows how much shopping around can save. Over the past week the SA average has fallen 4.9c. Petrolmate computes this average from every station reporting Unleaded Petrol in South Australia via the official government price feed, refreshed twice daily.
U-Go is currently the cheapest brand for Unleaded Petrol in South Australia at 224.0c per litre average across 5 stations. The gap between the cheapest brand (U-Go, 224.0c) and the priciest in our list (Independent, 235.2c) is 11.2c per litre — about $5.60 per 50-litre tank. Brand averages are recalculated twice daily from official price data, so the cheapest brand can change with the price cycle.
Over the past 83 days, Unleaded Petrol in South Australia has averaged 228.1c per litre, peaking at 247.0c on 12 October and bottoming out at 195.8c on 31 July — a range of 51.2c. Over the past week the SA average has fallen 4.9c. Monthly averages for the past half-year are published in the table on this page. All figures come from official South Australia government price reporting, aggregated daily by Petrolmate.