Originally Posted by GTC
Give a number - from what mileage with ethanol to what mileage without?
Speaking from my own experience, this is what I have observed between E10 (required ethanol) vs E-Zero (ethanol free).
I have this direct experience because during the winter, ethanol is not required so the gas stations sell ethanol free gas, but during the summer, E10 is required and the very same gas stations sell that.
Not considering air temps between summer and winter or when I drive spiritedly vs like a grandpa, this is my own numbers I have observed:
E-Zero (ethanol free): 16gal tank at 380 miles range, best observed
This is averaged to 23.75 MPG
E10 (summertime gas): 16gal tank at 315 miles range, worst observed
This is averaged to only 19.69 MPG.