So I bought the tuner of my coworker. Mainly for 87 octane savings mpg tune. We installed it. Truck def woke and more fun to drive. He said that it will take up to 2 weeks before i notice any mpg change on my info display. Is this true? Cause my MPG def didn't change and I go easy on the pedal.
I go through a tank of gas once a week at least. Right now in this weather I get around 620km. Before 680-700km. I think its cause of winter gas mainly.

 

The computer will go through one or two tanks before it processes any change in mileage. Best to hand jam a tank to two in the mean time. I am doing a CatBAck Exhaust, Gotts Air intake mod, Leveling Kit, and Tune all at the same time. My battery will be disconnected for several hours while I do mods. I will then start the truck drive it around a bit then do the tune.

 

I installed the 87 octane tune, Gotts air intake mod, and mbrp SiDo all together. I saw an increase of 3.5 mpg and noticable hp. I am pleased