Don't get pumped.
As of 21 October 2026, the cheapest Premium Unleaded 98 in South Australia is 240.4c per litre at U-Go, St Marys — versus the South Australia average of 258.5c (5.4c below the national average of 263.9c). Across 97 stations, Premium Unleaded 98 ranges from 240.4c to 285.5c, so filling a 50-litre tank at the cheapest station saves about $9.05 over the state average. Over the past week the SA average has fallen 1.7c.
Compare Premium Unleaded 98 across 97 stations in South Australia. Updated 03:40 AM, 21 Oct 2026.
Over the past 82 days, Premium Unleaded 98 in South Australia has averaged 250.2c per litre, peaking at 271.1c on 11 October and bottoming out at 220.5c on 31 July — a range of 50.6c. Over the past week the SA average has fallen 1.7c. Timing a fill-up around that range matters: on a 50-litre tank, filling at the period low instead of the peak saves $25.30.
| Month | Average Premium Unleaded 98 |
|---|---|
| April 2026 | 212.5c |
| May 2026 | 209.7c |
| August 2026 | 229.8c |
| September 2026 | 246.6c |
| October 2026 | 261.7c |
The cheapest Premium Unleaded 98 price in South Australia right now is 240.4c per litre, across 97 stations tracked. The cheapest suburb right now is Edwardstown at a 247.4c average across 2 stations. Filling a 50-litre tank at the cheapest station instead of a station charging the state average of 258.5c saves $9.05. 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 Premium Unleaded 98 is 258.5c per litre — 5.4c below the national average of 263.9c. Prices at individual stations range from 240.4c to 285.5c, a spread of 45.1c that shows how much shopping around can save. Over the past week the SA average has fallen 1.7c. Petrolmate computes this average from every station reporting Premium Unleaded 98 in South Australia via the official government price feed, refreshed twice daily.
U-Go is currently the cheapest brand for Premium Unleaded 98 in South Australia at 246.6c per litre average across 3 stations. The gap between the cheapest brand (U-Go, 246.6c) and the priciest in our list (EG Ampol, 262.9c) is 16.3c per litre — about $8.15 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 82 days, Premium Unleaded 98 in South Australia has averaged 250.2c per litre, peaking at 271.1c on 11 October and bottoming out at 220.5c on 31 July — a range of 50.6c. Over the past week the SA average has fallen 1.7c. 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.