Motorists have been told to be careful when using E10 petrol as some vehicles may not be compatible with the fuel.
In the event of a car tank being accidently filled up with the the incorrect petrol then severe damage could occur - and with it costly repairs.
According to the RAC there are an estimated 600,000 or so older vehicles and classic cars that must not use E10 and instead opt for E5 petrol.
Approximately 150,000 drivers inject the wrong type of fuel into their cars every year and a motoring expert has given out a couple of stark warnings.
National Scrap Car 's Dorry Potter told Express.co.uk : “The biggest benefit of E10 over E5 is that it is better for the environment.
“Where E5 is 95 per cent unleaded petrol and five percent ethanol, E10 is 90 per cent unleaded petrol and 10 per cent ethanol.
“Ethanol is made during the fermentation process of some crops such as sugarcane and grain, this means it is a more sustainable fuel as it is coming from a renewable source.
“This greener fuel is also estimated to reduce CO2 emissions by 750,000 tonnes per year, which is the equivalent of taking up to 350,000 cars off the road.”
Ms Potter added: “There are two issues with this fuel though.
"The first is that not all cars are compatible with it meaning that if someone was to absentmindedly put this fuel in a non-compatible car it is likely to cause damage.
“The Government has a tool on their website which helps motorists check whether their car is able to have E10.
“Secondly, E10 is less efficient for motorists, due to the higher ethanol content drivers will get fewer miles per gallon than with E5, meaning more trips to the pumps and more money coming out of wallets.
“Not something anyone needs with fuel prices still being high and the cost of living crisis.”
Dave Rossall, NFU Mutual’s Motor Claims Manager, agreed with Ms Potter’s comments and told drivers to check their compatibility with E10 before filling up their vehicles.
He said: “Putting the wrong fuel into a vehicle is comparatively easy to do so it should be reassuring to know that there is insurance cover in place."
Mr Rossall went on to note that although opinions differ, putting E10 into an "older petrol driven vehicle" once "should be ok".
However, he said it it not recommended to repeatedly do this as "putting E10 petrol into a diesel vehicle will definitely spell trouble.”
