What will happen if you put ethanol in a car designed to use unleaded gasoline?

Question

What will happen if you put ethanol in a car designed to use unleaded gasoline?

Answer 1

pow boom.....nothing...it will run but keep doing it and in 3 to 6 months the fuel system and engine will be corroded and ruined

Answer 2

E85 is mostly ethanol, and it has a higher octane than gasoline (105). That means that it may run hotter.

Rubber, magnesium, and aluminum parts may corrode faster. There’s some worry that the E85, being easier to ignite than gasoline, may be more likely to have fires if there’s a spark in the fuel pump.