Wheel Nut:
Forget the heat humps for now, a petrol car that did 400 miles on a tankful of unleaded is now doing 250 miles on E10
A lot of modern cars have knock sensors attached to the ECU which ■■■■■■ the ignition timing when they detect any detonation which will obviously be a lot when running something designed for 97 octane minimum on 95 octane.
Combined with the lower energy content of the fuel.
Which leaves the question why would increasing the amount of ethanol, which has a higher octane rating than petrol, reduce the octane rating.
It’s obviously just a rip off of very poor quality, probably 92 octane or less, petrol with more ethanol put in it, to lift the octane rating enough to make the stuff half useable.
Then they charge more for it and the government gets more tax revenue while exporting our higher quality Brent crude base.
All moot if/when Boris has forced unviable EV’s on us at 26p per kwh + road fuel taxes.