# When do fuel stations change their prices in Victoria?

Window: Jun 26, 2026 – Sep 23, 2026 · 90 days · rebuilt every night

- A station in Victoria changes its Unleaded 91 price 5.08 times a week on average, and a price that has just changed then holds for 1 day before the next one.
- On an ordinary day 91.8% of the stations in Victoria change their price; on the busiest day of the window, 99.9%.
- The busiest weekday is Tuesday, with 19.5% of all changes; the quietest is Sunday, with 5.3%.
- An increase moves the price by 0.021 AUD/L on average, a cut by 0.020 AUD/L. Over the window there were 40 085 changes upward and 22 978 downward.
- Half of all the price changes of the last 52 days happened on just 20 of them.
- When EG Ampol moves, 100% of its own stations move on the same day — the price of a station in this network is not set at the station.
- Reddy Express reaches the centre of a market-wide move first in 6 of the 6 waves we measured; the rest follow at a median of 0.3 days.
- Across the window the market median went from 1.221 AUD/L to 1.463 AUD/L.
- Where the source carries a clock of its own, most changes land between 06:00 and 07:00 — 67% of 1 640 changes carrying a timestamp in the sample.

## Unleaded 91

- Changes per station: 5.08 / week
- A price holds for: 1 day
- Stations: 1 672 · 63 063 price changes

| Which weekday | increase | cut |
|---|---:|---:|
| Monday | 6 195 | 4 160 |
| Tuesday | 6 430 | 5 865 |
| Wednesday | 7 693 | 3 374 |
| Thursday | 6 436 | 4 492 |
| Friday | 6 948 | 1 946 |
| Saturday | 4 114 | 2 049 |
| Sunday | 2 269 | 1 092 |

- increase: 0.021 AUD/L (n=40 085)
- cut: 0.020 AUD/L (n=22 978)

| Network | Stations | Changes / station / week | Together | Behind the first mover |
|---|---:|---:|---:|---:|
| Reddy Express | 192 | 5.86 | 100% | first |
| Caltex | 40 | 4.58 | 83% | 0.22 d |
| United | 121 | 5.51 | 96% | 0.25 d |
| BP | 291 | 4.96 | 95% | 0.27 d |
| Liberty | 47 | 5.09 | 96% | 0.29 d |
| Shell | 66 | 4.75 | 96% | 0.30 d |
| EG Ampol | 141 | 5.29 | 100% | 0.30 d |
| Metro Petroleum | 42 | 4.40 | 87% | 0.32 d |
| Ampol | 179 | 5.02 | 97% | 0.34 d |
| 7-Eleven | 204 | 5.32 | 97% | 0.40 d |

## Diesel

- Changes per station: 5.04 / week
- A price holds for: 1 day
- Stations: 1 053 · 39 445 price changes

| Which weekday | increase | cut |
|---|---:|---:|
| Monday | 4 080 | 2 513 |
| Tuesday | 4 105 | 3 550 |
| Wednesday | 4 650 | 2 299 |
| Thursday | 4 277 | 2 566 |
| Friday | 4 854 | 619 |
| Saturday | 2 988 | 903 |
| Sunday | 1 331 | 710 |

- increase: 0.019 AUD/L (n=26 285)
- cut: 0.015 AUD/L (n=13 160)

| Network | Stations | Changes / station / week | Together | Behind the first mover |
|---|---:|---:|---:|---:|
| Reddy Express | 177 | 5.86 | 93% | first |
| United | 122 | 5.57 | 97% | 0.21 d |
| ASTRON | 33 | 4.99 | 94% | 0.24 d |
| Independent | 34 | 4.64 | 94% | 0.26 d |
| Ampol | 120 | 4.95 | 98% | 0.27 d |
| Liberty | 48 | 5.10 | 98% | 0.30 d |
| BP | 157 | 4.84 | 98% | 0.30 d |
| Shell | 57 | 4.73 | 97% | 0.32 d |
| Apco Service Stations | 26 | 5.13 | 100% | 0.37 d |
| Riordan Fuels | 29 | 4.04 | 100% | 0.38 d |

## How this was measured

One price per station per day. The daily history table holds one row per station, fuel and day. A row is also written back to the date the source itself gives as the moment of the change, so a change lands on the day the operator made it, not on the day we happened to read it.
A change is two consecutive days in a station’s series with different prices; it is counted on the second of the two. If more than 3 days separate the two readings, the pair is dropped — there is no way to say which day the price moved.
A market-wide move — a “wave” — is a run of days on which at least 96% of the stations with a price changed it; the threshold is not a fixed number but the market’s own median plus half the way to its 95th percentile. Within a wave each network gets the centre of gravity of its own changes; the network whose centre falls earliest moved first. Waves found in this window: 6.
The figures are rebuilt once a night from the full history, not on every visit.

## What this cannot tell you

At most one change per station per day is visible, because the history keeps one price per station per day. A station that changes twice in one day is counted once.

Source of the prices: Servo Saver open data (Service Victoria, CC BY 4.0). Analysis: fuel-prices.eu.

Live fuel prices in %s: https://www.fuel-prices.eu/live/australia/victoria/

HTML: https://www.fuel-prices.eu/live/australia/victoria/price-changes/
JSON: https://www.fuel-prices.eu/live/australia/victoria/price-changes/data.json