Costco fuel prices in Western Australia
Costco fuel in Western Australia averages 214.7c a litre for Unleaded 91 today (31 October 2026), the same price at both stations.
In Perth? Costco fuel Perth compares Perth Airport and Casuarina side by side.
- Unleaded 91 avg
- 214.7c
- Premium 98 avg
- 236.7c
- Diesel avg
- 250.7c
- Stations reporting
- 2
Updated 31 October 2026 · Avg of 2 stations · cents per litre · ▲▼ change since the previous day
Costco fuel prices in Western Australia today
Cheapest first, cents per litre. Tap a station for its 30-day history and opening hours.
| Rank | Station | Unleaded 91 | Premium 98 | Diesel |
|---|---|---|---|---|
| 1 | Costco Casuarina (Kwinana) | 214.7c | 236.7c | 250.7c |
| 1 | Costco Perth Airport | 214.7c | 236.7c | 250.7c |
Costco fuel in Western Australia today
Both stations post the same Unleaded 91 price today, 214.7c.
Costco Unleaded 91 prices in Western Australia have eased about 3.0c over the past month, from 217.7c a month ago.
The furthest any single station moved was Casuarina, down 3.0c.
- vs the Australian Unleaded 91 average
- 8.9c below, at 223.6c
- Diesel
- sold at both stations
Average Costco fuel price in Western Australia
Last 30 days · cents per litreUnleaded 91: 217.7c on 2 Oct to 214.7c on 31 Oct, low 210.7c, high 228.7c. Premium 98: 241.7c on 2 Oct to 236.7c on 31 Oct, low 233.7c, high 249.7c. Diesel: 256.2c on 2 Oct to 250.7c on 31 Oct, low 248.7c, high 257.7c.
More Costco fuel guides
- Costco fuel opening hours · Every station, open now
- Costco diesel price today · Every station, cheapest first
- Which Costcos have fuel · Map of every station
- Costco fuel near me · By postcode or suburb
Costco fuel in Western Australia: common questions
Where is the cheapest Costco fuel in Western Australia today?
Nowhere in particular — both Costco fuel stations in Western Australia post the same Unleaded 91 price, 214.7c, as of the 31 October 2026 reading.
How many Costco fuel stations are there in Western Australia?
Western Australia has 2 Costco warehouses with a fuel station, and both of them reported a price in the last 30 days.
Which Costco fuel stations in Western Australia sell diesel?
Diesel is sold at both stations in Western Australia. Each station page lists the grades that warehouse has actually posted a price for in the last 30 days.
Is Costco fuel cheaper in Western Australia than in Australia?
Yes — the average Costco Unleaded 91 price in Western Australia is 214.7c, 8.9c below the Australian Unleaded 91 average of 223.6c as of the 31 October 2026 reading.
Are Costco fuel prices in Western Australia going up or down?
Down — the average Costco Unleaded 91 price in Western Australia has eased about 3.0c over the past month, from 217.7c to 214.7c.