Adelaide's cycle has shortened dramatically
Adelaide has moved in the opposite direction to the east coast. For most of the 2010s it had the longest discount cycle in Australia, stretching to five weeks between troughs; it has since compressed to an average of about two and a half weeks across 2025 on ACCC figures — now the shortest of the four multi-week capitals, while Sydney and Brisbane have stretched to five and six and a half. The peak-to-trough swing is still substantial — typically 25-35¢/L — but the timing window for cheap days is now shorter, so getting the call right matters more than it used to.
Every drop is imported
Adelaide's only refinery, Mobil's Port Stanvac, closed in 2003. Every litre of petrol sold in South Australia is now imported by ship, mostly from Singapore and South Korea. That makes Adelaide unusually sensitive to import costs: moves in crude oil and the AUD/USD rate, the macro signals PetrolPulse tracks, tend to flow through to Adelaide pump prices a few days ahead of refining-state capitals like Brisbane and Melbourne.
Live prices, smaller market
South Australia's Fuel Pricing Information Scheme has required mandatory price reporting since 20 March 2021 — retailers must report a change as close as possible to the moment it happens and no more than 30 minutes after — so PetrolPulse data for Adelaide is as fresh as Sydney's. The market is smaller though — roughly 600 stations statewide — and brand diversity is thinner. On Pasadena Road, Marion, and out through Noarlunga is where the discounters concentrate and where the cheapest prices typically appear first on any given cycle.
Written and reviewed by Mark Schreuder, founder of PetrolPulse