7-Eleven vs Costco: Premium Diesel
7-Eleven 664 stations · Costco 14 stations
Costco is lower by
19.5c/L- 7-Eleven average
- 284.2
- Costco average
- 264.7
- Grades both report
- 4
7-Eleven averages 284.2 c/L and Costco averages 264.7 c/L for Premium Diesel across Australia. On a 50-litre fill, that is $9.75.
Premium Diesel prices and stations
- Listed stationsEvery station FuelRadar lists for the brand664147-Eleven lists 650 more
Every fuel type, side by side
7-Eleven has the lower average in 0 of 4 grades both brands report; Costco in 4.
Premium Diesel by state
Average Premium Diesel in each state where both brands have a current report.
- New South Wales187 stations · 4 stations287.7268.7Costco 19.0c lower
- Queensland186 stations · 3 stations286.1268.7Costco 17.4c lower
- Western Australia56 stations · 2 stations276.8248.7Costco 28.1c lower
- Victoria198 stations · 3 stations280.9266.7Costco 14.2c lower
7-Eleven reports in NSW, QLD, WA, VIC, ACT. Costco reports in VIC, WA, NSW, ACT, QLD, SA.
7-Eleven vs Costco questions
Is 7-Eleven or Costco cheaper for Premium Diesel?
Across the current national Premium Diesel reports, Costco has the lower average at 264.7c, compared with 284.2c for 7-Eleven. These samples cover different stations and locations. Check nearby prices and update times before choosing.
What is the average 7-Eleven Premium Diesel price?
7-Eleven Premium Diesel averages 284.2c across 636 reporting stations in Australia, with the cheapest listed at 261.9c.
What is the average Costco Premium Diesel price?
Costco Premium Diesel averages 264.7c across 13 reporting stations in Australia, with the cheapest listed at 248.7c.
Should I always pick the cheaper brand?
Not necessarily. Brand averages move with the price cycle, and loyalty dockets or fuel vouchers can shift the real cost. Use this comparison as a guide, then check the fuel map for nearby station prices on your route.









