Welcome to da ClubZ Uncle Jack! Big congrats on your first Ram and don't worry, your mileage will improve a little bit once you get her broken in and her first oil change done. It is a truck with a Hemi but still gets near mileage numbers to challenge most V-6's. If your conservative with the foot. Anyways, you will appreciate the unbelievably smooth ride compared to any other truck brand out there, trust me. It is smooth offroad as it is on road. For your comparisons sake, I have a 2012 4x4 Hemi CrewCab with 3.55's and average 16mpg city/hwy mix and 19-20 straight hwy @ 72mph(my trucks sweet spot). 20k on my odom to date.
Total Chaos UCA's, Fox 2.0 IFP Coilovers and shocks, TTC-1223V variable rate coil springs.(Mods list)