New South Wales Diesel Holds Flat While Bomaderry Undercuts Sydney by 14 Cents
This week's fuel price data uncovers one of those headline numbers that tells motorists almost nothing useful. As of 3rd Sep 2026 2:14pm AEST, the New South Wales diesel average sat at 253.8 cents a litre across 1,250 stations, down a grand total of 0.6 cents on yesterday. On paper, nothing happened. Underneath that number, the gap between the best and worst suburbs in the state is wide enough to matter every single time you fill a ute or a work van.
Start with Bomaderry on the South Coast. Four stations there are averaging 237.4 for diesel, with the cheapest sitting at 225.9. That is more than 16 cents below the state average and roughly 14 cents under what drivers are paying in the better Sydney suburbs. For a 70 litre tank, that is close to $11 a fill, and for anyone towing or running a trade vehicle several times a week it compounds quickly.
The variation inside Bomaderry is the real story
Digging deeper into the numbers, Bomaderry is not uniformly cheap. The most expensive site in that same suburb is asking 250.9, a spread of 25 cents between servos you could walk between. Two motorists filling up in the same postcode on the same afternoon can pay wildly different amounts, and neither has done anything wrong. One simply checked and one did not.
This raises some interesting questions about how regional pricing actually works. The comfortable assumption is that country diesel is dearer because of freight, thinner competition and lower volumes. Bomaderry politely ignores that assumption. So does Oberon in the Central Tablelands, where four stations average 242.4 with a low of 237.9, still well under the state figure.
Western Sydney is consistent, and that is not automatically good news
Compare that to the western suburbs, where the pattern is the opposite. Fairfield has four stations averaging 240.0 for diesel, but the spread between the cheapest and dearest is a mere 1.4 cents. Prices there run from 239.5 to 240.9. East Wagga Wagga goes a step further: three separate stations, all sitting at exactly 239.5, no variation at all.
Motorists should be aware that tight clustering cuts both ways. It means you cannot get badly stung, but it also means shopping around inside those suburbs earns you almost nothing. The genuine savings sit in the suburbs with wide spreads, where one operator has decided to compete and the others have not. Smithfield is a good example, running from 237.5 to 251.9 across four sites, a 14 cent gap in a single suburb. Granville shows a narrower 5 cent band from 239.5 to 244.5.
A closer look at the statewide figures reveals something else worth investigating. NSW diesel is recorded between 194.5 and 336.0 cents, a spread of more than 141 cents. Prices at both ends of that range are outliers rather than anything a typical Sydney driver will encounter, but the top end is a reminder that remote and highway sites operate in a different market entirely, and that averages flatten a lot of pain.
How NSW compares nationally
Set against the other states, NSW is doing reasonably well on diesel right now. Victoria is at 253.9 after a modest 1.1 cent increase, Queensland at 254.7 after adding 2.4 cents, and Western Australia at 255.7. South Australia posted the largest movement of any mainland state, lifting 6.6 cents to 257.2. Tasmania recorded the sharpest decrease at 11.9 cents, though that reflects a small sample of reporting sites. The Northern Territory remains the national outlier at 293.5.
So NSW diesel drivers are neither the winners nor the losers this week. The bigger determinant of what you pay is not which state you live in, it is which servo you happen to pull into.
What motorists should do with this
The practical takeaway is simple. If your suburb shows a wide spread, checking before you fill is worth real money. If your suburb is tightly clustered like Fairfield or East Wagga Wagga, the saving comes from timing your fill and comparing with the next suburb over rather than the one across the road.
Current diesel prices across every NSW suburb are updated through the day, and the price trends view shows whether your area is moving with the state or against it. Armed with this information, motorists can make informed decisions and avoid paying more than necessary.
