Drivers slam E10 as a ‘joke’ with some vowing to return to E5

The US Energy Information Administration (EIA) also warned the energy content of ethanol is around 33 percent less than pure unleaded.

RAC spokesman Simon Williams has also previously warned divers would be getting “fewer miles to the gallon”.

He said: “Those with E10 compatible cars will, unfortunately, find they are getting fewer miles to the gallon as the fuel is less efficient than E5 fuel, due to it containing five percent more ethanol.”

However, some Express readers failed to see the issue surrounding the new E10 switch.