A chip does not equal better mileage. It does offer better performance. If you are talking about a gas engine, be aware that some of the chips will require you to run premium fuel.
To get the most performance from a chip, you will need to also add exhaust headers and low restriction exhaust as well as low restriction air inlet.
Ken
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Amateur Radio Operator (KE5DFR)|Full-Time! - 2012 6.7L Ford Crew Cab Dually -2013 HitchHiker Champagne 38RLRSB - Travel with one Standard Schnauzer and one small Timneh African Gray Parrot
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