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 2018, price cycle durations in these capital cities ranged from a low of 14 days to a high of 54 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 decreasing but they are likely to decrease further
- if possible, motorists should delay buying petrol until later.
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 14 Feb 19 | 6 | Wed 20 Feb 19 | 19 | 25 |
| Mon 11 Mar 19 | 9 | Wed 20 Mar 19 | 20 | 29 |
| Tue 09 Apr 19 | 8 | Wed 17 Apr 19 | 22 | 30 |
| Thu 09 May 19 | 8 | Fri 17 May 19 | 25 | 33 |
| Tue 11 Jun 19 | 7 | Tue 18 Jun 19 | 17 | 24 |
Petrol prices in Melbourne
Buying tip (updated Monday, Wednesday and Friday):
- prices appear to be around the lowest point of the cycle
- now is a good time for motorists to buy petrol.
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 |
|---|---|---|---|---|
| Thu 14 Feb 19 | 6 | Wed 20 Feb 19 | 19 | 25 |
| Mon 11 Mar 19 | 9 | Wed 20 Mar 19 | 15 | 24 |
|
Thu 04 Apr 19 |
6 |
Wed 10 Apr 19 |
20 |
26 |
| Tue 30 Apr 19 | 11 | Sat 11 May 19 | 15 | 26 |
| Sun 26 May 19 | 9 | Tue 04 Jun 19 | 21 | 30 |
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 |
|---|---|---|---|---|
| Wed 13 Feb 19 | 5 | Mon 18 Feb 19 | 20 | 25 |
| Sun 10 Mar 19 | 7 | Sun 17 Mar 19 | 23 | 30 |
| Tue 09 Apr 19 | 7 | Tue 16 Apr 19 | 22 | 29 |
| Wed 08 May 19 | 6 | Tue 14 May 19 | 29 | 35 |
| Wed 12 Jun 19 | 7 | Wed 19 Jun 19 | 17 | 24 |
Petrol prices in Adelaide
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 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 |
|---|---|---|---|---|
| Mon 25 Mar 19 | 5 | Sat 30 Mar 19 | 11 | 16 |
|
Wed 10 Apr 19 |
6 |
Tue 16 Apr 19 |
14 |
20 |
| Tue 30 Apr 19 | 8 | Wed 08 May 19 | 14 | 22 |
| Wed 22 May 19 | 6 | Tue 28 May 19 | 16 | 22 |
| Thu 13 Jun 19 | 5 | Tue 18 Jun 19 | 12 | 17 |
Petrol prices in Perth
Buying tip
Perth currently has regular weekly petrol price cycles, with prices generally peaking on Tuesday and then decreasing to a low on Monday.
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 |
| Mon 03 Jun 19 | 1 | Tue 04 Jun 19 | 6 | 7 |
| Mon 10 Jun 19 | 2 | Wed 12 Jun 19 | 5 | 7 |
| Mon 17 Jun 19 | 1 | Tue 18 Jun 19 | 6 | 7 |
| Mon 24 Jun 19 | 1 | Tue 25 Jun 19 | 6 | 7 |
| Mon 01 Jul 19 | 1 | Tue 02 Jul 19 | 6 | 7 |