WA Fuel Prices – Week of 4 May 2026

Diesel drivers across Western Australia have caught a genuine break this week. Metro diesel fell 7c to 235.6 c/L, while rural diesel tumbled an even steeper 9.9c to 253.6 c/L. If you've been putting off a big fill for the work ute or the caravan, the timing is looking a lot more forgiving than it did seven days ago.

WA Fuel Price Snapshot: 4–11 May 2026

WA Diesel and LPG Price Movements This Week

Diesel's slide didn't happen in one jump. Looking at the daily data, metro diesel opened the week at 240.1c on Monday and dropped steadily every single day, finishing at 230.8c by Sunday. That's a clean 9.3c fall across seven days in metro alone. Rural followed the same direction, easing from 258.9c down to 249.6c. Consistent, sustained relief rather than a one-day blip.

LPG moved the other way. Metro LPG crept up from 150.6c on Monday to peak mid-week at 151.7c on Saturday before nudging back to 151.6c on Sunday. The weekly average landed at 151.1c, which is still the cheapest fuel type available in WA by a wide margin. Rural LPG sat completely flat all week at 189.2c, which is an unusually wide gap over metro given the small number of stations involved.

Unleaded 91 in metro had a more volatile ride. It started the week at 175.8c, surged to 184.9c by Wednesday, then gradually pulled back to close at 179.4c on Sunday. That mid-week spike of nearly 9c is a reminder of how quickly conditions can shift, even within a single week.

WA Petrol Prices: What Metro Drivers Are Actually Paying

The spread between the cheapest and priciest metro stations this week tells a stark story. The lowest recorded metro price came in at 157.3c/L, while the highest reached 250c/L. That's a 92.7c gap depending purely on where you pull in.

Brand averages show a similar story. Burk averaged 168.5c across 9 metro stations, Liberty came in at 171.1c, and Atlas averaged 173.4c. At the other end, Ampol averaged 188.2c across 56 stations and Independents averaged 208.4c. Choosing the right brand could save you well over 30c per litre compared to the most expensive options.

How WA Compares to Other States on Fuel Prices

WA metro U91 at 180.5c/L sits 0.8c below the national metro average of 181.3c/L, making it one of the more affordable states to fill up right now. South Australia remains the cheapest state at 179c/L.

It's also worth keeping the 30-day picture in mind. Metro U91 has ranged from 149.3c to 250c over the past month, and the current 180.5c sits comfortably in the lower half of that range.

Best Day to Fill Up Last Week in WA

Last Monday, 4 May, was the cheapest day of the week for metro U91, with the daily average sitting at 175.8c/L. Drivers who topped up early in the week before Wednesday's spike saved themselves close to 9c per litre compared to those who waited.

WA Metro Petrol Price Forecast: Next 3 Days

The forecast for metro U91 points to a modest easing from the current 180.5c/L. Prices are expected to dip to 178.1c/L on Monday and Tuesday, then hold at 178.2c/L on Wednesday. That's a potential saving of around 2.4c per litre if you can wait until early next week.

How to Save on Fuel Costs in WA This Week

Diesel drivers should move while the numbers are good, given the consistent week-long slide. U91 drivers sitting near the current 180.5c average can afford to hold out a couple of days if the forecast holds. And no matter what you drive, the brand and station you choose matters enormously this week with a 92.7c gap between the cheapest and most expensive metro options.

Petrol Smart shows live prices on a map so you can see exactly what's available near you before you commit. Download it, set a price alert for your preferred fuel type, and let it do the watching for you. It's free and has no ads.