I read and read about tuners & modules and they all say you gain up to 4 miles per gallon with there system. I read people get more HP or better trans program but I just need to ask people if they get any improvement at all in MPG ? Please let me know what system and the amount of MPG gain?

 

I guess that there is no change in MPG! All of the adds were a little false.

 

I have the 2001 5.4L with 3.55s, dual exhaust, CAI and Power Programmer III. i can get 1-2 mpg extra, but generally get less since i'm always stomping on it.

 

Its going to depend on the vehicle and your driving habits, and the tune. 7.3L diesels certainly picked up that much in many cases. 6.0 can pick up mileage as well, but usually not as much. Gassers... some get no increase, some pick up 1-2. Rarely will gassers get more.

 

I live in Pa. but own a summer place in Va. every weekend I travel 225/250 miles one way.This is where I need the extra mileage. Now I get 14.7 mpg hope to get it a little better.