Not sure what to do with it, I suppose I will research this on the web and ask around. It was a hand me down from a guy that had a truck like mine and traded it for a new F150.

Any of you guys have this chip change device? how do you like it, has it been better for MPG?

The guy I got it from could not give good answers to the MPG stuff, because his truck was so heavily modified for towing that he could pin point the improvement from this alone. He said I should get 2-3MPG better mileage was his guess? However he did say that on the 100 setting I could see sports car performance without doing anything else. Although it would likely destroy my tranny. " so don't use the 100" was his advice. Stick with the 40 while pulling a trailer and the 70 when empty.

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