Market Update
Saturday 26 September 2026
Unleaded 91 and diesel · Brent crude, AUD/USD, capital pump prices, and city-by-city 4-week outlook
Produced automatically from PetrolPulse's live pricing data and forecast model — how our forecasts work. Methodology by Mark Schreuder · Data as of 26 September 2026
What moved this week
As of Saturday 26 September 2026, the national average for Unleaded 91 across Australia's capital cities sits at 239.0c/L, up 3.0c on last week. Diesel averages 288.0c/L nationally, with the cheapest reported bowser at 250.5c/L. Wholesale import costs lifted 1.1% over the past week to an estimated 167.4c/L — the input that flows through to pump prices over the following one to two weeks.
Wholesale market signals
Brent Crude
US$104.32
per barrel
Singapore MOGAS tracks Brent with ~1 week lag
AUD/USD
0.7026
exchange rate
A lower AUD raises the cost of imported fuel
Import Parity
167.4
cents per litre
Estimated cost of imported fuel, incl. excise and GST
What this means for pump prices
Brent crude held broadly steady around US$104.32 per barrel, while the Australian dollar weakened 1.3% against the US dollar, lifting the local cost of imported fuel. These are the two inputs that, together with refining and shipping margins, determine the wholesale cost of fuel landed at Australian terminals.
The four-week outlook is broadly stable. Prices remain elevated — global supply costs are higher than usual Petrol import costs are currently around 16% above where they were six weeks ago, driven by global supply disruptions. While costs have stabilised in the short term, the price floor has risen — expect to pay more than historical averages for the foreseeable future. Short-term cycle swings still apply, but each peak and trough will be higher than what was normal before the disruption.
Historically, moves in import parity take about 10-14 days to show up at the bowser. With wholesale increases this week, you can expect the pressure to filter through to pump prices over the next two weeks — earlier in metros that follow a tight price cycle, later in regional markets where retailers smooth changes out.
Capital city pump prices
Average and cheapest reported pump prices in each capital on Saturday 26 September 2026, with the change vs 7 and 30 days prior.
| City | U91 avg | U91 cheap |
|---|---|---|
| Sydney | 238.0c | 199.0c |
| Melbourne | 234.9c | 219.2c |
| Brisbane | 237.1c | 217.5c |
| Adelaide | 234.3c | 222.7c |
| Perth | 231.2c | 216.7c |
| Canberra | 246.2c | 227.9c |
| Hobart | 245.2c | 226.9c |
| Darwin | 244.8c | 198.0c |
Averages computed from stations within a metro radius of each capital. 7d and 30d deltas apply to the U91 average.
City-by-city cycle outlook
Where each capital sat in its local discounting cycle on Saturday 26 September 2026, and what the model was telling drivers to do.
Shared signal — Sydney, Canberra, Darwin
No sharp moves expected in the next few days — if your tank allows, there's no rush to fill up today. Global supply costs are currently 16% above their level six weeks ago. Prices may stay elevated longer than the usual cycle would suggest.
Sydney
Cycle position unclearYou have timeMelbourne
Cycle position unclearFill when you need toNo clear timing signal right now. Fill up when you need to.
Brisbane
Cycle position unclearYou have timeMonday is historically the cheapest day to fill up in Brisbane. That's 1 day away. If your tank allows, waiting could save up to 4.9¢/L. Global supply costs are currently 16% above their level six weeks ago. Prices may stay elevated longer than the usual cycle would suggest.
Perth
Cycle position unclearYou have timePrices here follow a strong weekly pattern — Tuesday is usually cheapest, about 12¢/L below the week's peak. Worth waiting ~2 days for the weekly low. Global supply costs are currently 16% above their level six weeks ago. Prices may stay elevated longer than the usual cycle would suggest.
Adelaide
Cycle position unclearFill when you need toNo clear timing signal right now. Fill up when you need to.
Canberra
Cycle position unclearYou have timeHobart
Cycle position unclearYou have timeMonday is historically the cheapest day to fill up in Hobart. That's 1 day away. If your tank allows, waiting could save up to 4.7¢/L. Global supply costs are currently 16% above their level six weeks ago. Prices may stay elevated longer than the usual cycle would suggest.
Darwin
Cycle position unclearYou have timeLooking ahead
If your tank can wait, the next predicted price low is approaching in Sydney (around 0 days away from the next trough), Brisbane (around 0 days away from the next trough), Perth (around 2 days away from the next trough).
How this update is generated
Each day at 6:00am AEST, PetrolPulse fetches the latest Brent crude spot price and AUD/USD exchange rate, then combines them into an import parity estimate (crude converted to Australian cents per litre, plus a fixed refining and shipping margin, excise and GST) to estimate the wholesale cost of fuel delivered to Australian terminals.
Capital city averages are computed from live station-level data within a metro radius of each capital — not state-wide aggregates — so regional outliers don't skew the headline number. Comparisons against 7 and 30 days prior show whether the city was trending up or down on the day, separate from the wholesale signal.
The city-by-city cycle outlook combines local cycle-position analysis with the forward-looking macro signals above. When import parity moves significantly relative to current retail prices and the recent margin, the directional call updates automatically.