I run the 87 tune almost all the time unless I'm towing my boat (then run tow). Don't actually notice a lot of difference between the two, but I have a manual and I think most of the difference is in shift points for the auto. I've run the 91 and mileage xs too, but have found the 87 works best for me. I actually get better mileage with 87 than xs. I usually fill with 88 and don't notice any issues between fuel there or above. I have run the Flashpaq with and without my CAI and now it runs with the CAI and MBRP exhaust. It feels like with a 6-speed the throttle is more responsive than stock, but the CAI and exhaust individually each gave me more of a power bump than the programmer. I also do most of my driving above 7000ft, and everything changes when I drop a few thousand feet.

 

Ok Kool cause I no with a lot of programmers that they suggest that u hav a aftermarket exhaust or Cai which at this tym I don't hav either now for the computer part which I don't hav one which I no is really funny but can u download everything to a smart phone an do the same thing ?

 

I have an auto with CAI and exhaust. I run 93 tune with 93. I don't track mileage, but this is the tune that I have found to be the most comfortable to drive. I have 3.73s and 35's and only turn overdrive off when I have to drive up hills on the interstate.

 

Great feed back thank you so much , I will try the different tunes and see which one feels right

 

https://www.jk-forum.com/forums/show...erchips-tuning

Here's some reading

 

Just got my superchip and trying out the 87 tune firts with full tank, next tank of gas i will try another tune . Untill i find the best for my driving. are the higher tunes safe for the 3.8 engine?