My experience is the same as the other complaints. Less power and worse mileage in proportion to the amount of ethanol. I reset the trip odometer with every fillup and you can count on losing 10% mileage with 10% ethanol. I am fortunate thoungh in that our area has rejected the blend to the point that it is difficult to find a station that actually carries it.
I don't understand the attempt. It is my understanding that the manufacture requires a tremendous amount of water and actually uses more energy to manufacture it than what it could ever potentially save. Are they just trying to use subsidized corn crops?
My preference would be to give me 9 tenths of a gallon of fuel for the price of a full gallon. The power level remains the same and the mileage works out the same as the blend for the price paid vs. distance traveled.
If you notice no difference, I am happy for you. My experience has been far different.