WA Fuel Prices – Week of 20 April 2026

Petrol in Western Australia has taken a serious tumble this week, and if you haven't filled up recently, you're sitting in a pretty good position. Metro U91 dropped 17.9c to land at 186.2 c/L, marking the third consecutive week of falls. That kind of sustained relief is rare, and it's putting WA drivers 3.1c below the national metro average of 189.3 c/L.

WA Petrol Prices This Week: Metro vs Rural Snapshot

Biggest Movers in WA Fuel Prices This Week

Diesel was the standout this week, and not in a subtle way. Metro diesel collapsed 38c to 261.0 c/L, while rural diesel fell 30.9c to 283.0 c/L. Tradies and anyone doing long regional runs will feel that immediately. Even so, metro diesel still sits 74.8c above U91, which is a punishing gap for ute and van drivers.

Premium grades also moved hard. Both P95 and P98 fell 18.2c in metro areas, landing at 201.5 c/L and 211.1 c/L respectively. Rural drivers chasing premium grades are still paying significantly more, with P98 averaging 224.7 c/L outside the city, compared to 211.1 c/L in metro areas. That 13.6c difference is real money on a full tank.

The daily trend for U91 tells a clean story. Prices opened the week at 191.9 c/L on Monday and fell almost every single day, touching 180.5 c/L by Sunday the 26th. There were no mid-week spikes or surprise reversals, just a steady, welcome slide downward.

How Prices Compare Across WA Stations

Here's where it gets interesting for Perth drivers who shop around. The cheapest metro station recorded this week came in at 159.3 c/L (Liberty Beckenham), while the most expensive sat at 250.0 c/L (Independent Chidlow Growers Mart Liquor Store). That's a 90.7c gap between the cheapest and priciest station in the metro area. The difference in spend on a 60-litre fill is over $54.

Brand averages reinforce this. Among the 18 brands with three or more stations, Burk averaged 174.4c, Liberty averaged 177.8c, and United averaged 178.6c. At the other end, Independent stations averaged 215.0c. That's a 40.6c spread between the cheapest and priciest brand averages. Where you buy matters as much as when you buy.

What Was the Cheapest Day to Fill Up Last Week?

Last Sunday (26 April) was the cheapest day of the week to fill up in metro WA, with U91 averaging 180.5 c/L. Compared to Monday's opening price of 191.9 c/L, drivers who waited saved more than 11c per litre.

WA Metro Petrol Price Forecast: Late April 2026

The forecast for metro U91 over the next three days looks genuinely encouraging. Prices are tipped to fall from the current 186.2 c/L to 175.9 c/L on Monday (78% confidence), 174.6 c/L on Tuesday (71% confidence), and 172.8 c/L on Wednesday (65% confidence). That would put metro U91 well below the current 30-day low of 159.3 c/L... actually, it would still sit above the cycle floor, but 172.8 c/L would be comfortably near the cheaper end of the 30-day range of 159.3c to 269.0c.

How to Save on Fuel in WA Right Now

With prices falling and a further drop forecast for early next week, it's worth holding off on a full tank if you can manage it. The difference between filling Monday versus today could be worth 10c or more per litre on current forecasts. Sticking to brands like Burk, Liberty, or United in metro areas, and using a price comparison tool to find the cheapest nearby station, could save you several dollars every single fill.

Petrol Smart shows live prices on a map so you can spot the cheapest station near you before you leave home. Download Petrol Smart for free, it has no ads and takes the guesswork out of finding the best price on any given day.