E10 petrol may lead to ‘rust’ and ‘corrosion’ in vehicle engines this winter – warning

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Since September, E10 petrol has been the standard form of unleaded fuel in the UK since E5 was reclassified as a premium fuel. E10 has been used around the world for a number of years, including across Europe, the USA and Australia.

It has also been the reference fuel against which new cars are tested for emissions and performance since 2016.

Despite this, some drivers have experienced issues with the petrol, citing problems with their engine and the efficiency of their fuel. 

The Government said the introduction of E10 would bring a small decrease in fuel economy, generally around one percent, although it would be unnoticeable to most drivers during regular journeys.

Despite this, many have seen a reduction in fuel economy, with some drivers potentially seeing further problems with the fuel in the coming weeks and months.

David Kaiser, head of research and development at Liqui Moly, said that E10 does pose a risk for vehicles which may be dormant over winter, like motorbikes and classic cars.

Speaking to Express.co.uk, he said: “The main drawback of E10 is the corrosion protection and the water adhesive properties.

“Vehicles like motorbikes, you don’t drive them the whole year, but you drive them in summer.

“During winter time when they are in the garage, water can get to the fuel which is something that happens.

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“In motorbikes, you often have steel tanks and therefore corrosion is one of the main disadvantages.

“We see a trend with drivers going more towards additives, obviously depending on E10, but with modern motorbikes, the engines are getting more and more sensitive.

“Older motorbikes, they come to an age now where they have some deposits inside where they can cause problems.

“They’re not perfect. The gas response is a little bit lower, and drivers realise more and more that additives are relatively cheap and a safe help to cure the problems they have with their vehicles.

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