SA Fuel Prices – Week of 22 June 2026

South Australia is the cheapest place in the country to fill a tank right now, and this week made that gap even wider. Metro U91 has now fallen for five consecutive weeks, sliding another 6.3c to a weekly average of 150.3 c/L. That puts SA a full 7c below the national metro average of 157.3 c/L, and well clear of the most expensive state, ACT, sitting at 166.8 c/L.

SA Fuel Prices This Week: Metro vs Rural Snapshot

Biggest Movers in SA Petrol Prices This Week

Diesel was the standout mover, dropping a remarkable 13.7c in metro areas to 179.4 c/L, and 12.3c in rural SA to 197.8 c/L. That's a genuine relief for tradies and freight operators who've been copping elevated diesel costs for weeks.

Metro U91 drifted steadily downward across the week, from 153c on Monday to a low of 148.1c on Saturday, before ticking back up slightly to 148.7c on Sunday. The rural story was similar, with prices easing from 177.4c to around 172c by late in the week.

P95 followed the same downward arc, finishing the week at 164.3c metro on Saturday before a small Sunday reversal to 164.8c. Rural P95 dipped to 184.5c mid-week before creeping back to 186.6c by Sunday, which suggests some upward pressure returning at the regional end.

E10 was the most consistent performer for budget-conscious drivers, barely wavering intra-week and closing out at just 143.2c metro on Sunday — the cheapest fuel available across SA right now.

P98 held its gradual slide through the week, touching 173c metro on Saturday before a marginal lift to 173.2c on Sunday.

What the Metro Price Range Tells SA Drivers

Shopping around in Adelaide genuinely matters. The cheapest metro station recorded 142.7 c/L, while the most expensive came in at 199.9 c/L — a gap of 57.2c per litre. Across a 50-litre tank, that's a $28.60 difference depending entirely on where you stop.

Brand averages reinforce this. For metro U91, U-Go averaged 146.9c and SOLO came in at 147.7c, while BP averaged 155.2c and Independent stations averaged 161.3c. That's more than a 14c spread between the cheapest and priciest brands — well worth factoring into your routine.

Last Week's Cheapest Fill-Up Day in SA

Last Saturday, 27 June, was the cheapest day to fill up for metro drivers, with U91 averaging 148.1 c/L. If you caught it then, you got close to the week's floor.

SA Metro U91 Petrol Price Forecast

The next couple of days look promising. Metro U91 is forecast to ease to 147.9 c/L on Monday and 147.1 c/L on Tuesday, both below the current weekly average of 150.3 c/L. Wednesday tells a very different story, with a forecast jump to 171.9 c/L — a likely cycle reset that would add roughly 24c per litre overnight. If you're running low, Monday or Tuesday is the window.

How to Save on Fuel in SA Right Now

With prices near the lower end of SA's 30-day range (the metro low has been 142.7c, current average is 150.3c), now is a reasonable time to keep the tank topped up before the forecast Wednesday spike. E10 at 145.2c metro is the clear budget pick if your car accepts it. Diesel drivers have had a particularly good week — grab it while it lasts.

Petrol Smart shows you live prices across SA on a map, so you can spot the cheapest station on your actual route rather than just guessing. Download it, set a price alert for your preferred fuel, and let the app do the watching for you. It's free and has no ads.