Petrol prices move up and down in regular patterns or cycles. The cheapest and most expensive days to buy petrol can change from cycle to cycle. Use price cycles to help you decide when to buy petrol.
Petrol price cycles in capital cities
A petrol price cycle is a movement in retail price from a low point (or trough) to a high point (or peak) to a subsequent low point. In these cycles, prices steadily go down for a period followed by a sharp increase.
Price cycles are the result of deliberate pricing policies of petrol retailers, and are not directly related to changes in wholesale costs.
The duration of petrol price cycles in Sydney, Melbourne, Brisbane and Adelaide varies from cycle to cycle, and has increased in recent years.
In 2019, price cycle durations in these capital cities ranged from a low of 13 days to a high of 38 days.
Disclaimer
Historical data can only give an indication of the cheapest and most expensive days to buy petrol in the future, so consumers should use this information as a general guide only.
The charts are updated daily from Monday to Friday at around midday, and show average daily prices for the last 45 days. Updates on Mondays include prices for the preceding Friday, Saturday and Sunday.
Buying tips are usually updated around midday on Monday, Wednesday and Friday.
The buying tips may not always seem apparent from the charts. This is because the charts show historical prices.
The charts show average daily regular unleaded petrol for all cities except Sydney, which shows E10 prices.
Petrol prices in Sydney
Buying tip (updated Monday, Wednesday and Friday):
- prices are increasing
- if motorists shop around they may find some retailers that have not yet increased prices.
The chart below shows daily average E10 petrol prices in Sydney over the past 45 days.
Source: FUELtrac
Information on the past five price cycles in Sydney is shown below:
| First day of cycle (low price) | No. of days to highest price in the cycle | Date of highest price in the cycle | Days to next cycle (next low price) | Total days in cycle |
|---|---|---|---|---|
| Thu 09 Jul 20 | 11 | Mon 20 Jul 20 | 30 | 41 |
| Wed 19 Aug 20 | 11 | Sun 30 Aug 20 | 25 | 36 |
| Thu 24 Sep 20 | 16 | Sat 10 Oct 20 | 22 | 38 |
| Sun 01 Nov 20 | 15 | Mon 16 Nov 20 | 17 | 32 |
| Thu 03 Dec 20 | 12 | Tue 15 Dec 20 | 28 | 40 |
Petrol prices in Melbourne
Buying tip (updated Monday, Wednesday and Friday):
- prices are decreasing but they are likely to decrease further
- if possible, motorists should delay buying petrol until later.
The chart below shows daily average regular unleaded petrol prices in Melbourne over the past 45 days.
Source: FUELtrac
Information on the past five price cycles in Melbourne is shown below:
| First day of cycle (low price) | No. of days to highest price in the cycle | Date of highest price in the cycle | Days to next cycle (next low price) | Total days in cycle |
|---|---|---|---|---|
| Tue 02 Jun 20 | 10 | Fri 12 Jun 20 | 27 | 37 |
| Thu 09 Jul 20 | 12 | Tue 21 Jul 20 | 28 | 40 |
| Tue 18 Aug 20 | 15 | Wed 02 Sep 20 | 41 | 56 |
| Tue 13 Oct 20 | 12 | Sun 25 Oct 20 | 30 | 42 |
| Tue 24 Nov 20 | 15 | Wed 09 Dec 20 | 34 | 49 |
Petrol prices in Brisbane
Buying tip (updated Monday, Wednesday and Friday):
- prices are decreasing but they are likely to decrease further
- if possible, motorists should delay buying petrol until later.
The chart below shows daily average regular unleaded petrol prices in Brisbane over the past 45 days.
Source: FUELtrac
Information on the past five price cycles in Brisbane is shown below:
| First day of cycle (low price) | No. of days to highest price in the cycle | Date of highest price in the cycle | Days to next cycle (next low price) | Total days in cycle |
|---|---|---|---|---|
| Fri 21 Aug 20 | 10 | Mon 31 Aug 20 | 28 | 38 |
| Mon 28 Sep 20 | 14 | Mon 12 Oct 20 | 26 | 40 |
| Sat 07 Nov 20 | 12 | Thu 19 Nov 20 | 20 | 32 |
| Wed 09 Dec 20 | 12 | Mon 21 Dec 20 | 23 | 35 |
| Wed 13 Jan 21 | 10 | Sat 23 Jan 21 | 19 | 29 |
Petrol prices in Adelaide
Buying tip (updated Monday, Wednesday and Friday):
- prices are decreasing but they are likely to decrease further
- if possible, motorists should delay buying petrol until later.
The chart below shows daily average regular unleaded petrol prices in Adelaide over the past 45 days.
Source: FUELtrac
Information on the past five price cycles in Adelaide is shown below:
| First day of the cycle (low price) | No. of days to highest price in the cycle | Date of highest price in the cycle | Days to next cycle (next low price) | Total days in cycle |
|---|---|---|---|---|
| Fri 27 Nov 20 | 3 | Mon 30 Nov 20 | 8 | 11 |
| Tue 08 Dec 20 | 7 | Tue 15 Dec 20 | 15 | 22 |
| Wed 30 Dec 20 | 6 | Tue 05 Jan 21 | 10 | 16 |
| Fri 15 Jan 21 | 4 | Tue 19 Jan 21 | 11 | 15 |
| Sat 30 Jan 21 | 3 | Tue 02 Feb 21 | 9 | 12 |
Petrol prices in Perth
Buying tip
Perth currently has regular weekly petrol price cycles, with prices peaking on Wednesday and then decreasing to a low on Tuesday.
The chart below shows average daily regular unleaded petrol prices in Perth over the past 45 days.
Source: FUELtrac
Information on the past five price cycles in Perth is shown below:
|
First day of cycle (low price) |
No. of days to highest price in the cycle |
Date of highest price in the cycle |
Days to next cycle (next low price) |
Total days in cycle |
| Tue 05 Jan 21 | 1 | Wed 06 Jan 21 | 6 | 7 |
| Tue 12 Jan 21 | 1 | Wed 13 Jan 21 | 6 | 7 |
| Tue 19 Jan 21 | 1 | Wed 20 Jan 21 | 6 | 7 |
| Tue 26 Jan 21 | 1 | Wed 27 Jan 21 | 6 | 7 |
| Tue 02 Feb 21 | 1 | Wed 03 Feb 21 | 6 | 7 |