'I couldn't believe it!' E10 could affect 'every' petrol car on the road leading to issues

Drivers questioned about the changes warned this could “mitigate emissions benefits” and could have a “cost impact”.

The DfT said: “We have considered the impact on fuel economy and decreasing MPG, which is due to the lower energy density of ethanol compared with fossil petrol, when developing our proposals.

“Analysis based on average calorific values of the two products suggests fuel economy could reduce by between one and two percent.

“However, the impact will vary based on driving style and refinements in fuel blending by suppliers.”