I have a 2011 Hemi with 4.10's,5 speed auto, regular cab. I pull a 26' enclosed trailer with all the junk. I figure the trailer loaded weights around 9000lbs. I haven't been in the hills yet pulling but I am getting about 8mpg. Normal driving around town, 12mpg. I drove it on a 300mile round trip empty and averaged 16mpg. I also can't justify a diesel for the limited usage of the truck. Just want to add the truck does every thing I want it to do and I love it!