Types of fuel and octane rating
| Type | Octane rating* | |
| E10 | Ethanol 94 |
Fuel is 10% ethanol and 90% unleaded petrol, octane rating 94 Ethanol is made from fermenting plants, such as wheat and sugar cane |
| U91 | Unleaded 91 | Standard unleaded petrol, octane rating 91 |
| E85 | Ethanol 105 |
Fuel is 70-85% ethanol and 15-30% unleaded petrol, octane rating 105 Only when cars are built or modified for this |
| P95 | Premium 95 | Premium unleaded petrol, octane rating 95 |
| P98 | Premium 98 | Premium unleaded petrol, octane rating 98 |
| DL | Diesel | For diesel engines only, no octane rating |
| PDL | Premium Diesel | Diesel plus additives for cleaning and efficiency, no octane rating |
| B20 | Biodiesel 20 | Fuel is 20% ‘bio’ (often vegetable oil) and 80% diesel, no octane rating |
| LPG | LPG |
Liquid petroleum gas or autogas, octane rating 100+ Only when cars are modified for this |
| CNG | CNG/NGV |
Compressed natural gas, octane rating 130+ Only when cars are modified for this |
| EV | EV charge |
Electric vehicle charging station, no octane rating Only for electric vehicles |
*What is an octane rating?
Octane rating is an index of the fuel’s resistance to burning. If it burns too early inside the engine, it causes destructive ‘pinging’. Higher octane numbers have more burning resistance than lower octane numbers. For example, P98 has more burning resistance than U91.