Since E10 petrol became the standard grade at UK pumps in September 2021, many drivers have questions about this fuel and whether it's right for their car.
What is E10 Petrol?
E10 contains up to 10% renewable ethanol, compared to the previous standard E5 which contains up to 5%. The "E" stands for ethanol, and the number represents the maximum percentage.
This change was introduced to help reduce CO2 emissions from transport. The government estimates E10 will cut transport CO2 by 750,000 tonnes per year — equivalent to taking 350,000 cars off the road.
Can Your Car Use E10?
The vast majority of petrol cars (95%) can use E10 without any issues. Your car is compatible if it was manufactured: - After 2011 (almost certainly compatible) - Between 2000-2011 (most are compatible) - Before 2000 (check carefully)
How to Check
- Look in your vehicle handbook
- Check the fuel filler cap — it should say "E10" if compatible
- Use the government's E10 compatibility checker
Cars That Cannot Use E10
Some vehicles should only use E5 (super unleaded): - Classic cars and vehicles over 20 years old - Some mopeds and motorcycles - Certain models from early 2000s (check manufacturer guidance)
Using E10 in an incompatible vehicle can cause: - Damage to fuel lines and seals - Corrosion of metal components - Starting problems
E10 and Fuel Economy
E10 contains slightly less energy than E5, which can affect fuel economy: - Expected reduction: 1-2% lower MPG - Real-world impact: About 1-2 extra miles per tank - Cost difference: Minimal for most drivers
Despite the slight efficiency drop, E10 is still cheaper than E5 super unleaded (typically 10-12p/litre less), so you'll still save money overall.
Where to Find E5 Petrol
If your car needs E5, you can still buy it at most stations — it's sold as "Super Unleaded" or "Premium Unleaded" (97 RON or higher). All stations that sell petrol must offer at least one E5 grade.
Our Advice
- Modern cars: Use E10 standard unleaded — it's cheaper and your car is designed for it
- Older or classic cars: Stick with E5 super unleaded
- If unsure: Check your handbook or use E5 to be safe
Use our fuel map to compare E10 and super unleaded prices at stations near you.