Don't get pumped.
As of 21 October 2026, the cheapest Premium Unleaded 98 in Western Australia is 240.9c per litre at EG Ampol, Greenwood — versus the Western Australia average of 263.8c (0.6c below the national average of 264.4c). Across 718 stations, Premium Unleaded 98 ranges from 240.9c to 328.9c, so filling a 50-litre tank at the cheapest station saves about $11.45 over the state average. Over the past week the WA average has risen 8.9c.
Compare Premium Unleaded 98 across 718 stations in Western Australia. Updated 09:42 PM, 21 Oct 2026.
Over the past 82 days, Premium Unleaded 98 in Western Australia has averaged 241.8c per litre, peaking at 263.5c on 14 October and bottoming out at 221.7c on 2 August — a range of 41.8c. Over the past week the WA average has risen 8.9c. Timing a fill-up around that range matters: on a 50-litre tank, filling at the period low instead of the peak saves $20.90.
| Month | Average Premium Unleaded 98 |
|---|---|
| April 2026 | 210.0c |
| May 2026 | 216.4c |
| June 2026 | 211.9c |
| July 2026 | 204.3c |
| August 2026 | 230.3c |
| September 2026 | 242.8c |
| October 2026 | 252.5c |
The cheapest Premium Unleaded 98 price in Western Australia right now is 240.9c per litre, across 718 stations tracked. The cheapest suburb right now is Oakford at a 245.3c average across 2 stations. Filling a 50-litre tank at the cheapest station instead of a station charging the state average of 263.8c saves $11.45. 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 Western Australia average for Premium Unleaded 98 is 263.8c per litre — 0.6c below the national average of 264.4c. Prices at individual stations range from 240.9c to 328.9c, a spread of 88.0c that shows how much shopping around can save. Over the past week the WA average has risen 8.9c. Petrolmate computes this average from every station reporting Premium Unleaded 98 in Western Australia via the official government price feed, refreshed twice daily.
Burk is currently the cheapest brand for Premium Unleaded 98 in Western Australia at 248.7c per litre average across 13 stations. The gap between the cheapest brand (Burk, 248.7c) and the priciest in our list (Liberty, 261.6c) is 12.9c per litre — about $6.45 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 Western Australia has averaged 241.8c per litre, peaking at 263.5c on 14 October and bottoming out at 221.7c on 2 August — a range of 41.8c. Over the past week the WA average has risen 8.9c. Monthly averages for the past half-year are published in the table on this page. All figures come from official Western Australia government price reporting, aggregated daily by Petrolmate.