I burn it from time to time with no problems. But then I like to put a top tier in the tank about every fourth fill-up or throw in a bottle of fuel injector cleaner if I'm running a lot of generic fuel. The fuels I'm more concerned with are those with up to 10% ethanol marked on the pump. I wonder what the long term effects will be on our gaskets, hoses, and sensors since our vehicles are not E-85 engineered.