Don't get pumped.
As of 9 September 2026, the cheapest Premium Diesel in Australian Capital Territory is 236.7c per litre at Costco, Canberra Airport ACT — versus the Australian Capital Territory average of 268.1c (9.5c above the national average of 258.6c). Across 88 stations, Premium Diesel ranges from 236.7c to 277.9c, so filling a 50-litre tank at the cheapest station saves about $15.70 over the state average. Over the past week the ACT average has risen 6.2c.
Compare Premium Diesel across 88 stations in Australian Capital Territory. Updated 11:54 PM, 09 Sep 2026.
Over the past 90 days, Premium Diesel in Australian Capital Territory has averaged 237.1c per litre, peaking at 265.8c on 9 September and bottoming out at 200.1c on 23 June — a range of 65.7c. Over the past week the ACT average has risen 6.2c. Timing a fill-up around that range matters: on a 50-litre tank, filling at the period low instead of the peak saves $32.85.
| Month | Average Premium Diesel |
|---|---|
| April 2026 | 271.8c |
| May 2026 | 259.4c |
| June 2026 | 214.9c |
| July 2026 | 215.1c |
| August 2026 | 255.4c |
| September 2026 | 262.2c |
The cheapest Premium Diesel price in Australian Capital Territory right now is 236.7c per litre, across 88 stations tracked. The cheapest suburb right now is Canberra Airport ACT at a 248.1c average across 5 stations. Filling a 50-litre tank at the cheapest station instead of a station charging the state average of 268.1c saves $15.70. 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 Australian Capital Territory average for Premium Diesel is 268.1c per litre — 9.5c above the national average of 258.6c. Prices at individual stations range from 236.7c to 277.9c, a spread of 41.2c that shows how much shopping around can save. Over the past week the ACT average has risen 6.2c. Petrolmate computes this average from every station reporting Premium Diesel in Australian Capital Territory via the official government price feed, refreshed twice daily.
Metro is currently the cheapest brand for Premium Diesel in Australian Capital Territory at 261.8c per litre average across 12 stations. The gap between the cheapest brand (Metro, 261.8c) and the priciest in our list (Ampol Foodary, 273.1c) is 11.3c per litre — about $5.65 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 90 days, Premium Diesel in Australian Capital Territory has averaged 237.1c per litre, peaking at 265.8c on 9 September and bottoming out at 200.1c on 23 June — a range of 65.7c. Over the past week the ACT average has risen 6.2c. Monthly averages for the past half-year are published in the table on this page. All figures come from official Australian Capital Territory government price reporting, aggregated daily by Petrolmate.