Note also that the list of vehicles with “low greenhouse gas” ratings are mostly *not* flex-fuel. That’s tacit admission by the EPA that higher levels of ethanol in gasoline blends are not beneficial.
E85 (85% ethanol) fuel only has about 65% of the energy content per unit volume as compared to 100% gasoline. Even less when compared to diesel.
That’s why E85 is a loser. It may cost less, but the MPG will drop significantly.
It also helps to explain why vehicles seldom seem to match the factory test MPG (which is done with 100% gasoline).
The EPA is full of lawyers, not engineers. That’s why we get idiotic (and often contradictory) regulations from it.