SA Fuel Prices – Week of 27 April 2026

South Australia is on a roll. Metro U91 has now fallen for four consecutive weeks, sitting at 175.1 c/L this week and holding the title of cheapest state in the country. That's not a small thing — it's real money back in your pocket every time you fill up.

SA Fuel Prices Snapshot: 27 April to 4 May 2026

Biggest Movers in SA Fuel Prices This Week

The standout this week is diesel, which has plunged 21.6c in metro areas to reach 243.1 c/L. Rural diesel dropped a significant 19.6c to 267.4 c/L too. If you drive a diesel vehicle, this is the biggest weekly relief you've seen in a while.

U91 kept its steady downward drift all week, slipping from 175.5c on Monday to a mid-week low of 174.9c on Wednesday before edging back up to 175.4c by Saturday. Metro prices were remarkably stable — barely a cent of movement across the entire week. Rural U91 told a slightly better story, easing from 201.9c down to 199.6c by Saturday.

E10 remained the cheapest fuel available in SA this week at 168.4 c/L metro, and it also saw a solid 7.7c drop week-on-week. If your car can run on it, the savings over U91 are worth considering.

P95 and P98 both edged down by around 7c each, with P95 landing at 191.2 c/L and P98 at 199.9 c/L metro. P95 showed a slight uptick on Saturday to 191.6c, so it's one to watch heading into next week.

Metro Station Price Range: How Much Shopping Around Can Save SA Drivers

There's a jaw-dropping 98.2c gap between the cheapest and most expensive metro stations this week. Costco Kilburn is currently averaging 166.7 c/L for U91, while the most expensive metro option sits at 264.9 c/L. That's not a typo. On a 60-litre tank, choosing wisely could save you nearly $59.

Brand averages reinforce the point. SOLO is the cheapest brand average at 170.8c, followed closely by Liberty at 171.1c and U-Go at 171.4c. At the other end, BP averages 180.8c and independent sites average 195.6c — a gap of 25c per litre over the cheapest brands. Over a full tank, that difference adds up fast.

Cheapest Day to Fill Up Last Week

Last Wednesday (29 April) was the cheapest day to fill up, with metro U91 touching 174.9 c/L. Prices nudged back up slightly toward the weekend, so mid-week continues to be your friend.

SA Metro Petrol Price Forecast: Next Three Days

The short-term outlook for metro SA is encouraging. The forecast has U91 easing from the current 175.1 c/L down to 174.9 c/L on Sunday, 174.4 c/L on Monday, and 173.4 c/L by Tuesday — though confidence drops to 65% on that last figure, so treat it as a directional guide rather than a guarantee.

How to Save on Fuel in SA Right Now

SA metro drivers are already paying 5.6c less than the national average of 180.7 c/L, so the state is in a genuinely good position. The current 175.1 c/L metro average is sitting very close to the 30-day low of 166.7c, which means prices are historically cheap right now, even if they're not at rock bottom.

If you're on diesel, this week's 21.6c metro drop is the clearest signal to top up sooner rather than later. For petrol drivers, the forecast points slightly lower through early next week, so there's no rush, but prices are already well below where they were a month ago.

One more thing worth flagging: diesel supply is a little tighter than usual, with 27 metro and rural diesel stations currently reporting stock shortages, up from 21 last week. It's not a crisis, but if your usual diesel station is dry, it's worth checking alternatives before you drive out of your way.

Petrol Smart shows you live prices on the map so you can see exactly which stations near you have stock and what they're charging. Download it for free, no ads, no catches — just smarter fuel decisions every time you drive.