E10 vs 91 vs 95 vs 98: what each fuel costs today
FuelWatch · FuelCheck August 2026
- Unleaded 91
- 233.9
- 936
- Premium 95
- 246.9
- 527
- Premium 98
- 256.9
- 721
- Diesel
- 279.9
- 678
- Premium diesel
- 280.9
- 458
- LPG
- 159.5
- 37
- E85
- 269.9
- 13
- E10 vs U91, Sydney August 2026
- 98 over 91, WA today
- +23.0
- Extra for 60 L of 98
- $13.80
- LPG median, WA
In WA today the median servo asks 233.9 c/L for 91-octane unleaded, 246.9 for premium 95 and 256.9 for 98: 98 costs 23.0 cents more, which is $13.80 on 60 litres.
Most cars sold in Australia run happily on 91. Premium only pays where the manufacturer asks for it (the octane rating is printed inside the fuel flap); a higher number does not clean the engine or add power to a car tuned for 91.
Every grade in WA today
| Fuel | Median | Cheapest | Dearest | Servos |
|---|---|---|---|---|
| Unleaded 91 | 233.9 | 217.3 | 450.0 | 936 |
| Premium 95 | 246.9 | 236.3 | 310.8 | 527 |
| Premium 98 | 256.9 | 242.7 | 327.9 | 721 |
| Diesel | 279.9 | 253.3 | 450.0 | 678 |
| Premium diesel | 280.9 | 256.5 | 300.5 | 458 |
| LPG | 159.5 | 144.5 | 239.9 | 37 |
| E85 | 269.9 | 269.9 | 269.9 | 13 |
Sydney, where E10 is everywhere
WA servos do not sell E10, so Sydney is the place to measure it. Over August 2026 E10 averaged 198.1 c/L against 200.0 for U91, a discount of 1.9 cents. E10 is 10% ethanol, carries less energy per litre (around 3% less) and suits most petrol cars built since the mid-1980s; the owner's manual has the final word.
| Fuel | Average | vs U91 |
|---|---|---|
| LPG | 116.2 | −83.8 |
| E10 | 198.1 | −1.9 |
| Unleaded 91 | 200.0 | ±0.0 |
| Premium 95 | 218.2 | +18.1 |
| Premium 98 | 225.6 | +25.6 |
| Diesel | 243.8 | +43.8 |
| Premium diesel | 247.4 | +47.4 |
LPG and E85
LPG is cheap per litre, 159.5 c/L in WA today, but only 37 WA servos still sell it and an LPG car burns more litres per kilometre. E85 is rarer still: 13 sites in WA.
Before you fill up
Is E10 cheaper than 91?
Yes, by about 1.9 c/L in Sydney (August 2026, FuelCheck).
How much more is 98 than 91?
23.0 c/L at the WA median today.
Can I put 98 in a car that takes 91?
Yes, it does no harm, but it brings no benefit in a car designed for 91.