Hector's Auto Repair

How does ethanol affect my mileage?

Ethanol contains roughly one third less energy than ethanol-free (also known as non-ethanol) gasoline does, which means you will get slightly fewer miles per gallon if you use E10 or E15. The fewer miles per gallon you get is small, but measurable. Vehicles will typically get 3-4% fewer miles per gallon out of their vehicle when running E10. For E15, the amount goes up to 4-5% fewer miles per gallon. For example, if you’re driving a vehicle that gets 32 miles per gallon, and you’re running E10, you would get between 0.96 to 1.28 miles less per gallon, taking you down to between 30.72 to 31.04 miles per gallon.

The VIN number is unique to your vehicle. It’s stamped on multiple places on a vehicle, the 2 most common being the driver door jam and on the bottom of the driver side of the windshield.