Was getting my oil changed today (yes, synthetic) and the poeple were really pushing Gumout, something they said would clean my injectors and give me better power and fuel mileage... the guy said I'd get 50-150 extra miles per tank.... sounds like a load of BS to me.. anyone have any experience with this product? If it really adds that much mileage to your car then I've been in the dark for way too long...
