While many brands, BMW among them, have declared their entire petrol engine ranges fine for E10 there are some exceptions, including 993 (and earlier) Porsche 911s. First generation FSI engines used in VW, Audi, SEAT and Skodas typically between 2000 and 2006 are not E10 compatible but all the group's current petrol engines are.

Other PH favourites like pre-2002 MX-5's and icons such as the Peugeot 205 GTI will also not be able to use the E10 fuel. Unlike the switch from leaded to unleaded petrol, there are (as yet) no fuel additives on offer to counter the issues around E10 either.

Drivers of older cars that won't take the E10 biofuel will have to seek out regular fuel, which is expected to become less common over time.