Originally Posted by 93XJcountry
the 6.7s are a great damn motor my buddy gets 22mpg with his on the high way and 15 in town. and for those who are gonna ask, well whats all done to it: 6 in rough country lift, 37x12.5x17's cooper stt's, chip, strait piped 4 in exhaust with dpf delete, sb cold air, south bend dual disk clutch, and i cant remember what else right now. and it tows like there is nothing behind it
well that goes against all of what the forums say and several of my friends 6.7ls. Im sure its a very nice truck though. The cummins is a bad motor!
I got 35mpg the other day with my 6.4L pulling 15k through the rockies