Just over half a million cars could be incompatible as new fuel is introduced across British petrol stations this week.
Drivers with cars over the age of ten and classic cars could now be forced to use premium fuel as "greener" E10 petrol begins to replace E5.
The new formula is not compatible with all vehicles as the new fuel contains a higher mix of bio-ethanol.
So drivers have been urged to use the Government's E10 fuel checker to make sure they can continue using the correct fuel.
The checker, which is available by clicking here, asks users to choose their vehicle brand before listing which models are and are not compatible.
The checker also goes into further detail including the year of registration affected, before advising those unsure to instead use 'premium, which remains E5.
So what happens if you don't use the correct fuel
As a result of an increase in ethanol, the formula is not compatible with some cars and continued use of unleaded could cause damage to the vehicle.
According to the Department of Transport, vehicles using the new fuel when it is not compatible could suffer from major engine and mechanical problems.
Footman James says this could be anything from damaged fuel pumps, blocked fuel filters, degradation to corroded carburettors to flexible fuel hoses.
The Government has said all petrol pumps will be marked during the rollout, meaning drivers will know whether or not they can use unleaded for the time being.
It has since created a vehicle checker, which allows drivers to check whether their cars, motorcycles and mopeds can use E10. To check your vehicle please visit- https://www.gov.uk/check-vehicle-e10-petrol.
It has said the following may not be compatible:
1 Some specific cars from the early 2000s.
2 Some mopeds, particularly those with an engine size of 50cc or under.
3, Cherished, classic and older vehicles.
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