I was at a petrol station a couple of years ago and there was some old bloke in a camper towing a beautiful old Riley, wetting his knickers about the E5 in the fuel and trying to find if there was anything ethanol free. He was blocking two pumps and causing a right stink.
He then tried to tell me that it would destroy my Morgan petrol tank and provided numerous other horror stories. I humoured him, filled up and drove off. 15,000miles later, tank is still OK....