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wilsonator

  1. fuel mileage

    I have and 08 silverado with the 5.3, i have a borla exhaust and a k&n air charger 63 on it. Anyways i have been trying to figure my average fuel mileage, the problem is i have 22"s on it and it came with 20"s, the guy at the rim shop said now it is 1" taller with the rim and tire combination on it now thus throwing off my odometer by a few miles an hour and when i compute my fuel mileage i get 17, i know it has to be better than that, does anyone know a way i can figure an ...
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