Don't get pumped.
As of 22 July 2026, the cheapest Premium Unleaded 98 in South Australia is 182.7c per litre at Costco, Blair Athol — versus the South Australia average of 203.9c (2.8c below the national average of 206.7c). Across 589 stations, Premium Unleaded 98 ranges from 182.7c to 292.9c, so filling a 50-litre tank at the cheapest station saves about $10.60 over the state average. Over the past week the SA average has risen 16.3c.
Compare Premium Unleaded 98 across 589 stations in South Australia. Updated 11:52 AM, 22 Jul 2026.
Over the past 88 days, Premium Unleaded 98 in South Australia has averaged 201.9c per litre, peaking at 214.7c on 25 April and bottoming out at 182.1c on 1 July — a range of 32.6c. Over the past week the SA average has risen 16.3c. Timing a fill-up around that range matters: on a 50-litre tank, filling at the period low instead of the peak saves $16.30.
| Month | Average Premium Unleaded 98 |
|---|---|
| April 2026 | 212.5c |
| May 2026 | 209.7c |
| June 2026 | 193.4c |
| July 2026 | 191.5c |
The cheapest Premium Unleaded 98 price in South Australia right now is 182.7c per litre, across 589 stations tracked. The cheapest suburb right now is Gilles Plains at a 188.5c average across 2 stations. Filling a 50-litre tank at the cheapest station instead of a station charging the state average of 203.9c saves $10.60. 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 203.9c per litre — 2.8c below the national average of 206.7c. Prices at individual stations range from 182.7c to 292.9c, a spread of 110.2c that shows how much shopping around can save. Over the past week the SA average has risen 16.3c. 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 192.2c per litre average across 5 stations. The gap between the cheapest brand (U-Go, 192.2c) and the priciest in our list (EG Ampol, 205.2c) is 13.0c per litre — about $6.50 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 88 days, Premium Unleaded 98 in South Australia has averaged 201.9c per litre, peaking at 214.7c on 25 April and bottoming out at 182.1c on 1 July — a range of 32.6c. Over the past week the SA average has risen 16.3c. 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.