2007-2008 6.7L 4X4 owners: I'm getting 17+ mpg around town, almost 20 on the highway. I've been told this will increase somewhat as the cummins breaks in, maybe up to 22 on the highway.
I'm going to mount either 295, 305, or 315's on my 2008, wondering how everyone's mileage is with any of these oversize tires.
__________________
2008 QCSB 6.7L 4X4 2500 6-speed Mineral Gray