Clare Petrol Climbs 20 Cents Overnight as South Australia Becomes Mainland's Most Expensive Diesel Market

Clare Petrol Climbs 20 Cents Overnight as South Australia Becomes Mainland's Most Expensive Diesel Market

A comprehensive analysis of South Australia's fuel pricing data for the week ending 26th April 2026 reveals two stories worth motorists' attention. Unleaded petrol in the Mid North town of Clare has climbed 19.6 cents to 201.8 cents per litre across five servos, while the statewide diesel average has pushed past every other mainland state to sit at 271.0 cents per litre.

According to overnight data captured at 08:04 AM AEDT on Sunday, Clare's unleaded shift represents one of the largest single cycle moves recorded in regional SA this month. Five separate stations have lifted from a previous average of 182.2 cents to 201.8 cents, a swing of 10.7 percent in a single update window. Motorists who filled up earlier in the week have effectively saved around $10 on a 50 litre tank compared with those filling today.

The Diesel Picture Across the Country

Drilling down into the regional comparison, South Australia's diesel market now sits at the top of the mainland leaderboard. The state average climbed 15.6 cents in 24 hours to reach 271.0 cents per litre. That figure now exceeds the averages recorded in Western Australia at 261.3 cents, Victoria at 261.5 cents, New South Wales at 266.7 cents, and Queensland at 268.4 cents.

Only the Northern Territory, with its remote freight surcharges and an average of 306.8 cents, sits above SA on the national diesel ladder.

The data paints a clear picture of a market diverging from its neighbours. WA diesel actually moved in the opposite direction over the same window, dropping 35.3 cents on average. VIC slipped 9.6 cents. SA, NSW and QLD all lifted, but SA's 6.1 percent jump was the steepest of the trio.

Where Adelaide Drivers Can Still Save

For motorists willing to shop around within South Australia, pockets of value remain. Wingfield in northern Adelaide holds three diesel stations averaging 245.1 cents, with the cheapest pump at 241.5 cents. That represents a 26 cent saving against the state average, or roughly $13 on a typical 50 litre fill.

Further north, the wheatbelt town of Balaklava is offering diesel from 239.9 cents across three sites, with the average sitting at 247.9 cents. For drivers heading up the Horrocks Highway toward Clare, Balaklava remains a sensible refuelling stop before the regional premium kicks in.

Why Clare Stands Out This Week

Breaking down the regional differences, Clare's unleaded jump is consistent with patterns seen in other Mid North towns when wholesale margins reset after a sustained discount cycle. Historical comparison shows Clare has bounced between 180 and 205 cents through the autumn months, so today's 201.8 cents reading sits at the upper end rather than at any record peak.

Industry factors at play include the typical lag between metropolitan and regional cycle resets. Once Adelaide servos begin lifting prices off their cycle bottom, regional towns generally follow within 48 to 72 hours, often catching up in a single sharp move. Today's Clare data is consistent with that pattern.

This is not the only story unfolding in the SA market. The Lower North town of Balaklava has held diesel relatively steady, and Adelaide metro stations have largely tracked sideways week on week even as the broader state diesel average has climbed.

What Motorists Should Take Away

For anyone planning a regional trip across South Australia this weekend, the practical advice is straightforward. Fill diesel before crossing the SA border from Victoria, New South Wales or even Western Australia, each of which is now offering cheaper averages. For unleaded, the value gap between Adelaide metro and regional towns like Clare is widening, so timing and route planning matter more than they have all month.

Historical data suggests SA's diesel premium against neighbouring states tends to compress within seven to ten days, but with WA trending down and SA trending up, that gap could persist for longer than usual. For motorists willing to shop around, the data clearly demonstrates that location and timing remain the two most important factors in fuel savings.