Smart's official E10 statement
As published on the UK government E10 checker, reproduced word for word. Checked 25 October 2026.
E10 petrol is cleared for use in all petrol engine Smart vehicles.
Source: GOV.UK – Check if your vehicle can use E10 petrol. Contains public sector information licensed under the Open Government Licence v3.0.
If your Smart can't use E10
Use E5, sold as super or premium unleaded. Any car that runs on unleaded can use E5. If you have already filled up with E10 by mistake, don't worry: one tank won't harm it. What to do after the wrong fuel →
Own an older or classic Smart? Read E10 and classic cars.
Questions about Smart and E10
Can my Smart use E10 petrol?
Smart says E10 is fine for all its petrol cars.
What if I put E10 in an older Smart?
A single tank in a non-approved car will not cause damage, according to UK government advice. Fill up with E5 next time and keep using E5.
Where do I find E5 for my Smart?
In the UK, E5 is sold as the "super" or "premium" unleaded grade (97+ octane) at most larger filling stations. Check the E5 label on the pump.
How else can I check my Smart?
Look for an E10 label inside the fuel filler flap, check the owner's handbook, or ask a Smart dealer.