Owners of classic vehicles including motorbikes have to be very careful not to put fuel containing ethanol into their tanks as it can cause seal failure and corrosion in fuel system - I saw a classic motorbike website a while ago with a list of fuels that did not contain ethanol.
Exactly! When Belgium started with the 10% ethanol last year, there was a letter hanging at every fuel pump at Shell to use V-Power for classic cars etc because that contains no ethanol.