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poor mileage
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  1. 6.0 Motor problems
    I have been reading a bunch of poor mileage threads and have failed in finding a good answer. I want to know if there is anything I should look at as being wrong with my truck or if I am just stuck with crappy MPGs. Truck mods are in sig, 3.73 gears. I use to get 18mph highway when it was bone...
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