6.4 Hemi Trucks
I did quite a bit of research on these before ordering one for work. the consensus has been that those who own them have seen an increase in fuel mileage after they get a couple thousand miles on them. I am not sure what to really expect with the one I ordered, 3500 series dually four door with an 8 ft bed and 4:10 gears. That will not help the mileage much and once the lift-gate and rack is installed that will knock it down a bit more I believe. We shall see, it is supposed to be in sometime this week and then the fun of tearing it apart will begin to do the above, paint and letter it.