 But according to a new study released by the Coordinating Research Council, this new ethanol-gasoline mix may be fueling engine breakdown. According to the study, three of the eight engines the group tested failed on blends of 20% and 15% ethanol. Because two of those engines successfully ran on 100% gasoline, the study determined that ethanol was an influential factor for the engine failures. Time will tell if the EPA revs up or puts the brakes on this controversial motor fuel. Just the Facts is a presentation of CFACT.