Cheapest fuel prices, trends and insights across Australia
Cheapest Diesel Fuel Prices in Mount Gambier, SA Today
As of 3 July 2026, the cheapest Diesel around Mount Gambier, SA is 166.90 c/L at United Petroleum Mount Gambier. Average across 13 stations within 5km of Mount Gambier centre is 174.80 c/L – down 17.6 cents over the past two weeks.
Prices from South Australia Government, updated every 15 minutes.
Cheapest Diesel stations in Mount Gambier
Top 13 of 13 stations, sorted by price.
Cheapest suburbs in the Mount Gambier area
Lowest live Diesel price per suburb across the wider Mount Gambier area. Distance from Mount Gambier centre.
Fuel prices by type
7 fuel types available around Mount Gambier.
Frequently asked questions
Where is the cheapest Diesel in Mount Gambier?
The cheapest Diesel around Mount Gambier, SA is 166.90 cents per litre at United Petroleum Mount Gambier, 193-195 Jubilee Highway East.
When is the best day to buy fuel in Mount Gambier?
Based on the past 4 weeks, Saturdays tend to have the cheapest Diesel prices around Mount Gambier, averaging 181.90 c/L. Thursdays tend to be the most expensive at 186.30 c/L – a difference of 4.4 cents.
How many petrol stations are in Mount Gambier?
FuelTrack tracks prices at 13 stations selling Diesel around Mount Gambier, SA. The area has 7 fuel types available, including LPG, E10, U91, U95.
What petrol brands are in Mount Gambier?
There are 7 fuel brands around Mount Gambier including United, BP, APCO, Ampol, Independent, Reddy Express, Shell. Compare prices across all brands to find the cheapest fuel.
What's happening with Australia's fuel excise in 2026?
Fuel excise is the federal tax built into the price of every litre of petrol and diesel. It normally rises twice a year in line with inflation, and in early 2026 it sat at 52.6 cents a litre. When conflict in the Middle East pushed oil prices higher, the government brought in cost-of-living relief: from 1 April it roughly halved the excise, taking about 32 cents a litre off the bowser price. On 20 June that relief was extended into July but tapered to a 16 cent cut, lifting the excise to 36.6 cents, so pump prices rose at the start of July. The reduced rate runs until 2 August. From 3 August the full 52.6 cent excise returns, and because GST is charged on top of it, that's expected to add about 18 cents a litre at the pump, or roughly $9 on a 50-litre tank, unless retailers absorb part of the increase. A routine inflation adjustment in early August nudges the rate a little higher again.
Prices from South Australia Government. View all South Australia suburbs. Compare fuel prices across Australia.