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None of that at all mentions it's effects on the engine of the car...

I already knew those stats (there abouts) the question is... how does it effect the engine of the car when it's in the tank.

Ethanol has a worse effect on a car's engine then regular gas causing miles per gallon to drop both in the short term. (When burning ethanol) and in the long term (when burning either due to it gunking up the engine.)