Will using non-ethanol gas make my car run better?

I have a 2017 Ford Fiesta. I fill up with it 75 miles ago and haven't noticed and big difference. Mileage so far isn't any different.

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  • 3 weeks ago
    Favourite answer

    Your car will run the same.

    Your gas mileage will increase a bit.

    The car's computer adjusts for different gasoline blends.

    When the EPA  concludes any given cars estimated mileage, they use straight, no ethanol, gasoline.

  • JOHN B
    Lv 6
    3 weeks ago

    A few years back I was getting 6mpg better on pure gas. I've noticed that something has changed either the formulation or the octane. Both are about the same now.

    I use the pure due to the fact I have an older model and the ethanol is supposedly corrosive to certain plastic and rubber material. The 10% isn't too bad but the E85 requires a flex-fuel vehicle, which is made with corrosive-resistant material.

  • Anonymous
    3 weeks ago

    Heck, in my state we can't get non-ethanol gas. I live in the Nazi state of California.

    Were you using E85 or E15? If E85 you should notice a little increase in mileage since ethanol has about 33% less energy than gasoline.

  • 3 weeks ago

    ethanol leaves a residue behind, that's why i never use it.

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  • CB
    Lv 7
    3 weeks ago

    No it won't make any difference you could measure without some very sensitive equipment.

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