It sounds like an additive found in food but from next year E10 will be causing headaches for hundreds of thousands of classic car owners. Rather than being a colouring agent or preservative, E10 is the new grade of unleaded petrol that the British Government plans to introduce in 2021. And it is potentially damaging to modern classics, classic cars and motorbikes alike.
Read more at ……….. https://www.hagerty.co.uk/articles/everything-you-need-to-know-about-using-e10-fuel-with-your-classic-car/
MGB tips mods and maintenance 