Territory Diesel Sits 39 Cents Above the Pack as Six States Cluster Within 2.2 Cents

Territory Diesel Sits 39 Cents Above the Pack as Six States Cluster Within 2.2 Cents

According to pricing data collected at 2:06pm AEST on Thursday 30th Jul 2026, six states are recording average diesel prices within 2.2 cents of one another, while the Northern Territory sits alone at 275.3 cents per litre, roughly 39 cents clear of the pack. The mainland states normally spend their weeks swapping places by fractions of a cent, so a divide this wide is one of the sharpest the national market has produced this year.

State by state, Victoria is the cheapest jurisdiction for diesel at an average of 235.9 cents across 1,058 stations. NSW and Queensland share second place at 236.6 cents, Tasmania averages 237.5, South Australia is at 237.7 and Western Australia rounds out the group at 238.1. The ACT sits slightly higher at 241.3 cents. Then comes the Territory, where 181 stations produce an average of 275.3 cents. That is a gap of 39.4 cents to Victoria and about 37 cents to every other mainland state.

For anyone running a diesel vehicle, the arithmetic is straightforward. On a 60 litre tank, the difference between the Victorian average and the Territory average works out to about $23.60 per fill. For the larger 4WDs and utes that dominate Territory roads, many with tanks of 80 litres or more, the gap stretches past $31 every time the low fuel light comes on.

The outlier hiding inside the outlier

Despite carrying the highest average in the country, the Territory is also home to one of the cheapest single diesel prices recorded anywhere in Thursday's data: 187.9 cents per litre. That undercuts the best price in NSW, which is 196.8 cents at Delegate near the Victorian border, and sits well below Hopetoun on WA's south coast, the cheapest diesel town in the west, where four servos average 208.9.

At the other end of the Territory scale, the dearest site is listed beyond the 430 cent mark. That produces a spread of 244.1 cents between the cheapest and dearest diesel in the same jurisdiction, comfortably the widest in the country. NSW, for comparison, records a spread of 139.2 cents and Queensland 135.0, and both of those states have more than five times as many diesel sites reporting.

None of this is mysterious. Freight distances in the Territory are the longest in the country, station density is the lowest, and remote roadhouses carry cost pressures a suburban servo never sees. Competition around Darwin keeps the populated end of the Territory reasonably close to east coast levels, while highway sites between towns can price with little pressure from rivals.

The Territory also runs a 24 hour price lock, which means the price a servo posts in the morning is the price it must hold for a full day. Our guide to the Territory's 24 hour price lock explains how motorists can use that certainty, because a cheap board spotted at breakfast will still be there in the afternoon.

Even the week's biggest mover cannot close the gap

The sharpest single day movement in Thursday's data belongs to Western Australia, where the state diesel average rose 13.1 cents from 225.0 to 238.1, an increase of 5.8 per cent. Even after a rise of that size, WA diesel remains 37.2 cents below the Territory average. Historical data suggests one day moves like that wash through within a price cycle. The northern premium has proven far more durable than anything a single cycle can shift.

For Territory motorists, the savings are there for those willing to plan ahead. Checking current diesel prices before a long trip and timing a fill under the price lock rules can claw back a meaningful share of that 39 cent gap. Six states are separated by 2.2 cents this week. The Territory is separated from all of them by the length of its supply lines, and no single week of price movement is going to change that.