I have an 05 qc 2500 4x4 with automatic. The truck was averaging around 20 on the interstate and 15-16 around town. I put an Edge Juice with Attitude box on it and the mileage has went to crap. Been averaging between 10-11mpg no matter what the driving condition or setting on the box. Any suggestions? My tires are 315/70/17's.

 

I beleive you are enjoying the power. More power does not equal same fuel milage. SORRRRRYYYY!!!!!!!!!

 

+1

Also are you doing the mileage correction for the larger tires?

 

take the EDGE out and try it........

 

Getting 22 average with my Smarty Jr!!! I can actually get more than 24 when I baby it!!! More power DOES equal better mileage!!!

 

What other mods do you have that you are getting 22 - 24 mpg? I have a 06 with a Smarty Jr. and it has never seen better than 15 mpg on the on road at 60 mph. You going by the over head or hand calc?

 

Or is your truck a 2x4, is that a overall average, or the best you have gotten out of one tank. I see alot of unverified numbers, speedos are off, people using the overhead, etc. I'm getting an average of 15-16 MPG...

 

my mpg has taken a dump the last few tanks also.

i know the overhead is not accurate, but i have been reading 11-12mpg the last few tank. that is with a quad xzt, stock and the mileage max

what gives?

 

mine has steadily been going down... I think my stock tranny and converter are getting tired...