To date, petrol in the UK has contained up to 5% renewable ethanol (known as E5). Jaguar 3.4 Mk 2. Jaguar 3.4 "S" Mk 2. Jaguar 340 Mk 2. Check before you use E10 Petrol in your Classic Car. If your vehicle is not compatible with E10 fuel, you will still be able to use E5 by purchasing the ‘Super’ grade petrol from most filling stations.
