What gears does the Dodge have? Most you will find have 4.10's and you should expect 8-12 in town and 14-17 hwy.
Hemi
Wow! I believe I'll hang on to my Cummins, even with the fuel price difference......
Yeah, the cummins is probably more fuel efficient vs the Hemi. However, if you don't pull a lot or pull some but not that heavy of loads (up to 12K lbs) the Hemi is the way to go. You can buy A LOT of fuel for the upgrade to a diesel.
Hemi