Cheapest U91 Fuel Prices in South Australia Today
As of 21 May 2026, compare live U91 prices across 231 stations in 90 suburbs across South Australia. Cheapest right now is 167.50 c/L in Port Adelaide. State average is 180.90 c/L. Prices from official South Australia government data, updated every 15 minutes.
U91 prices across South Australia swung 10.3 cents over the past 4 weeks. The Middle East conflict drove a surge to 185.20 c/L around 15 May, before the fuel excise cut on 1 April brought some relief. Currently averaging 180.90 c/L. The spread between cheapest and most expensive suburbs is 39.4 cents.
Cheapest suburbs for U91 in South Australia
Lowest live price per suburb.
Most expensive suburbs for U91
Highest live U91 price per suburb.
Regions in South Australia
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90 suburbs in South Australia
Browse live U91 prices by suburb, sorted alphabetically.
Frequently asked questions
Where is the cheapest fuel in South Australia?
As of 21 May 2026, the cheapest U91 in South Australia is 167.50 cents per litre in Port Adelaide. The state average is 180.90 c/L across 231 stations. Prices update every 15 minutes from official government data.
How many petrol stations are in South Australia?
FuelTrack tracks prices at 231 petrol stations across 90 suburbs in South Australia. Prices are sourced from official government fuel price monitoring schemes and updated every 15 minutes.
What is the best day to buy fuel in South Australia?
Based on the past 4 weeks, Tuesdays tend to have the cheapest U91 prices in South Australia, averaging 177.90 c/L. Saturdays tend to be the most expensive at 180.70 c/L – a difference of 2.8 cents. Patterns vary by suburb, so check your local area for the most accurate timing.
Compare fuel prices in other states
Prices from official South Australia government fuel price monitoring data. Compare fuel prices across Australia.