 The loss of energy, the E85 has so much fewer BTUs of energy per gallon than even the stuff that only has 10% alcohol adulterating it that their gas economy drops badly. I have seen no evidence, I've talked to no one that doesn't lose enough fuel economy on E85 versus E10 that the cost difference is wiped out or they actually spend more traveling on the E85. I'm surprised they're still even selling E85 because no one really buys it, do they? Yeah.