What is E10 petrol?
As of 1st September 2021, the new E10 petrol grade will be introduced as a way for the Government to reduce harmful emissions that come from vehicles. E10 petrol has the same 95-octane rating as current unleaded petrol, the only difference is it will contain a higher percentage of ethanol. The petrol supplied at filling stations currently, has a 5% mix of ethanol which gives it the name of E5. From September, the amount of ethanol in petrol will increase to 10% and be identified as E10 petrol.
Why is the amount of ethanol being doubled?
The increase in ethanol, which is produced from sustainable sources such as farming products like wheat and corn, will mean a decrease in the remaining fossil fuel content found in petrol. The introduction of E10 petrol will mean there is an overall reduction of CO2 emissions, helping the government achieve climate change targets. The change has been calculated to cut harmful vehicle emissions, approximately equivalating to 350,000 cars taken off the road.
Why hasn’t the ethanol content been much higher?
The properties of ethanol are very different to that of fossil-fuelled petrol, higher ethanol content can cause corrosion within the engines of older vehicles. E10 petrol is suitable for newer engines and vehicles, however, there will be E5 petrol still available for older vehicles by using the super unleaded grade.
Is E10 petrol only being introduced in the UK?
No. E10 petrol is already commonly used worldwide and since 2016, it has been tested as a reference fuel for performance and new car emissions.
Can you mix E10 and E5?
According to the Department for Transport, you can mix E10 and E5 petrol if your vehicle is compatible with E10. Its guidance says: "It's perfectly safe to mix them in the same tank or fill up with E5 if E10 is not available."
Is your car compatible?
The majority of vehicles manufactured since 2011 are compatible with E10 petrol, but there are a few exceptions. To see whether your vehicle is compatible, click here.
What if my vehicle isn't compatible?
If your vehicle is not compatible with E10 petrol, you can continue to use E5, which will remain available at many petrol stations. However, E5 will become slightly more expensive, with estimates suggesting it could cost around £6 more to fill up a tank compared to an E10-compatible equivalent.
What if I put E10 in by mistake?
If you accidentally use E10 fuel in an incompatible vehicle, it shouldn't be a major problem - just ensure you use E5 petrol next time. The Government warns: "Prolonged use of E10 petrol in a non-compatible vehicle may cause harm and is not recommended."