Don't get pumped.
As of 6 September 2026, the cheapest Unleaded Petrol in South Australia is 192.7c per litre at Costco, Blair Athol — versus the South Australia average of 209.5c (0.7c below the national average of 210.2c). Across 651 stations, Unleaded Petrol ranges from 192.7c to 325.0c, so filling a 50-litre tank at the cheapest station saves about $8.40 over the state average. Over the past week the SA average has risen 10.0c.
Compare Unleaded Petrol across 651 stations in South Australia. Updated 07:57 AM, 06 Sep 2026.
Over the past 90 days, Unleaded Petrol in South Australia has averaged 180.4c per litre, peaking at 207.9c on 6 September and bottoming out at 159.4c on 1 July — a range of 48.5c. Over the past week the SA average has risen 10.0c. Timing a fill-up around that range matters: on a 50-litre tank, filling at the period low instead of the peak saves $24.25.
| Month | Average Unleaded Petrol |
|---|---|
| April 2026 | 190.3c |
| May 2026 | 185.8c |
| June 2026 | 170.5c |
| July 2026 | 171.0c |
| August 2026 | 205.6c |
The cheapest Unleaded Petrol price in South Australia right now is 192.7c per litre, across 651 stations tracked. The cheapest suburb right now is Clearview at a 198.5c average across 2 stations. Filling a 50-litre tank at the cheapest station instead of a station charging the state average of 209.5c saves $8.40. 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 209.5c per litre — 0.7c below the national average of 210.2c. Prices at individual stations range from 192.7c to 325.0c, a spread of 132.3c that shows how much shopping around can save. Over the past week the SA average has risen 10.0c. 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 197.6c per litre average across 5 stations. The gap between the cheapest brand (U-Go, 197.6c) and the priciest in our list (EG Ampol, 209.4c) is 11.8c per litre — about $5.90 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 90 days, Unleaded Petrol in South Australia has averaged 180.4c per litre, peaking at 207.9c on 6 September and bottoming out at 159.4c on 1 July — a range of 48.5c. Over the past week the SA average has risen 10.0c. 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.