Worse Gas Mileage with Costco Gas?

Seems like a bunch of bunk to me, but in this forum post the guy says he gets worse mileage with Costco gas than gas from other places.

Do you think there’s any truth to that? I believe that gas is gas, and the rest is marketing.

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2 responses to “Worse Gas Mileage with Costco Gas?

  1. Thats weird, I know Costco sells basically BP gas.

  2. Williams Learner

    Depending on your area all gas is from the same refiner except there are some secondary companies that put an extra cup per tankerfull of their “special additive”. Just check to find out where the supplier gets his fuel from, its all the same.

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