I don't know if using E85 makes your bike any more eco friendly. Probably just the opposite like you said. Only thing I know is that it's a bit cheaper here. -RE85 1,07 € / litre, $5,35 / gallon. 85 % ethanol. -95E10 1,65 € / litre, $8,35 / gallon. 10 % ethanol. -98E5 1,70 € / litre, $8,61 / gallon. 5 % ethanol. And maybe I'm more interested about the fact could it be done than any real savings etc.