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the ecu doesn't figure mileage, the scanguage takes into account fuel gph, miles traveled ect, ect. and i am not talking scanguages in particular, i am talking about cars equipped with gauges that figure such things from the factory. they just seem to vary from what i get using a pen and paper. i have never used a scanguage before, but i just assume they cannot be 100 percent. i know the distance to empty can be waaaaaay off too.
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