i've had my diablosport installed for a couple of months now with the 93 tune and mds delete. MPG seemed to drop a little, but of course it's my first winter with the truck and tuner, and i've been warmin it up with the remote start so it's hard to tell if it actually hurt the mileage. What tune are u guys runnin with the diablo, will the 91 tune yield a little better mpg with the same performance benefits

 

I run the 91tune and mds delete. I noticed mpg increased over stock.

 

Same...but I added a little spark down low and fuel in the mid range.