Gas mileage with ethanol free vs 10% ethanol

[Propane_Car]

@Bear2013

Ethanol free gasoline costs about 25 cents more per gallon here in South Carolina- $3.72 per gal compared to regular 87 octane gasoline with ethanol $3.47 per gallon.

Yikes. Prices jumped significantly here overnight but it went up to $2.55 for E10.