Petrol prices in Australia are influenced by global crude oil prices, the Australian dollar exchange rate, refinery costs, retail margins, and state government fuel excise arrangements. Prices fluctuate in regular cycles in major capital cities as retailers adjust prices in response to competitive pressures.
The Australian Institute of Petroleum publishes weekly petrol price data for all states and territories, tracking both the retail price at the bowser and the underlying wholesale price. The ACCC monitors petrol prices and regularly publishes reports on price cycles and regional price differences.
Petrol price cycles are most pronounced in Sydney, Melbourne, Brisbane and Adelaide, where prices can vary by 30 to 50 cents per litre over the course of a week or two. Buying at the bottom of the cycle can produce meaningful savings for regular commuters.
Diesel prices typically exceed unleaded petrol prices and are less subject to retail price cycles. Diesel is the primary fuel for commercial transport, agricultural machinery, and a significant proportion of passenger vehicles particularly in rural areas.
Data sourced from Australian Institute of Petroleum weekly retail price survey. Updated weekly. Annual averages calculated from weekly data across the most recent complete financial year.