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E10 Fuel, What you need to know

What is E10 Fuel?

In short, E10 refers to 10% Bio-Ethanol content in 95-Ron fuel, it’s been 5% (E5) for some time now and will be changing in all regular petrol across the UK throughout the summer.

Why is this happening?

It will help drop the C02 Emissions of the UK by some 750,000 tonnes according to The Bio-ethanol is created from renewable sources, mainly through sugar fermentation from the likes of corn, maize and wheat crops.

Do I need to do anything about it?

Well, for most people the answer is probably no. Around 95% of cars are compatible with E10.  If you drive a Ford car built after 1992, all but one car is compatible with the new fuel – the Mondeo 1.8 Sci, built between 2003-2007.

If you drive a vehicle other than a Ford and it’s older than 2011, we’d strongly suggest using the gov websites checker, here

If you drive a classic car, your vehicle may not be compatible with E10. Some filling stations will continue to sell high-octane fuel (97 Ron+) which is typically E5, however always check the nozzle before filling.  Some scooters, mopeds and bikes, particularly those less than 50CC may not be compatible. The same applies to some boats, mowers and other garden machinery. For those, please check with the manufacturer.

What are the downsides?

Fuel economy can be slightly adversely affected with E10, (officially reported to be 1%) however the greater risk is to classic vehicles whereby the ethanol can degrade rubber seals or fibreglass fuel tanks over time.  

What if I fill up by mistake?

Don’t panic, this shouldn’t pose a real risk for one tank (unless you are storing the car for a period) simply keep topping up with E5 to dilute the E10 down and this is safe.

Can I mix E10 and E5 fuel?


Does Cuff Miller seller E5 Petrol?

Cuff Miller has now swotcjed entirely to E10 Petrol.

I drive a classic but want to fill up at Cuffs, can I add anything to my fuel?

Yes, it is possible to add fuel stabiliser to E10 and E5 fuel which should help fight corrosion, although we have not yet evaluated any ourselves. We would still not recommend classic vehicles sit with fuel in the tank for any length of time if possible.

How do I check my vehicle is ok with E10?

Here’s the link again: Compatibility checker.

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Cuff Miller & Co. (Littlehampton) Ltd is authorised and regulated by the Financial Conduct Authority, FRN: 688437. All finance is subject to status and income. Written quotation on request. We act as a credit broker not a lender. We work with a number of carefully selected credit providers who may be able to offer you finance for your purchase. We are only able to offer finance products from these providers. We may recieve a fixed fee commision.

It is our intention to provide a high level of service at all times. However if you have reason to make a complaint about our service you should contact Cuff Miller & Co. (Littlehampton) Ltd, Horsham Road, Littlehampton, West Sussex BN17 6BX. If we are unable to resolve your complaint satisfactorily, you may be entitled to refer the matter to the Financial Ombudsman Service (FOS). Further information is available by calling the FOS on 0845 080 1800 or at