Costco Fuel Prices in Western Australia

As of 4 September 2026, Costco sells Unleaded Petrol in Western Australia from 186.7c per litre across 2 stations, averaging 186.7c — 28.0c below the Western Australia average of 214.7c. The cheapest Costco Unleaded right now is 186.7c at Costco Casuarina.

Compare Costco prices across 2 stations in Western Australia. Updated 09:36 AM, 04 Sep 2026.

Western Australia data source: Petrolmate sources Western Australian prices directly from WA FuelWatch, the WA Government's 24-hour rule price scheme — WA retailers must publish their next-day prices by 2pm and hold them for 24 hours. We sync at 6am Perth time (9am AEDT).
Unleaded Petrol (186.7c)
Premium Unleaded 98 (210.7c)
Diesel (234.7c)
234.7c
Average Diesel
234.7c
Cheapest
234.7c
Highest
2
Stations

Cheapest Costco Diesel in Western Australia

Costco Perth Airport
Perth Airport • 142 Dunreath Dr...
234.7c
Costco Casuarina
Casuarina • 137 Market St...
234.7c

Costco in Western Australia Insights

Costco by Suburb

Casuarina (187c)Perth Airport (187c)

Compare Brands in Western Australia

BrandAvg ULPStations
Burk192.7c16
Petro Fuels197.6c9
Vibe197.7c54
Atlas198.8c23
Metro199.8c9
United204.3c32
7-Eleven205.5c63
Astron206.3c6

Related Pages

Costco Nationally Western Australia All Brands ULP in Western Australia Diesel in Western AustraliaCostco in New South WalesCostco in VictoriaCostco in QueenslandCostco in South Australia