Hemi Truck Owners ?

My kids '04 1500 Quad Cab, 4x2, 3:55 gear. he will get 17-18MPG on the hiway & 13-14MPG in town. When he tows the race car, staying in the TOW/HAUL mode @ 65MPH it will get 12MPG. These numbers are close to or better than my last 1500 with the 5.9 engine. His truck has a 127k on it. This has been a very good truck & plenty of power. My brother-in-law has a 2005 f150, 5.4 engine 4x4, crew cab. a very gutless truck, "NO POWER"! he gets 15MPG hiway & 10-11 in town. we used his truck to tow in a relatives broke down acura ( I didn't think the jap stuff broke down?). It averaged 9MPG towing the dead car back. Now if you need towing & fuel milage, look no further than my 2003 3500 Dodge Quad-Cab, 23MPG hiway & 18MPG towing the race car. What A truck! The problem with the ball-joints, is that a 4x4 thing? My 2003 is a 4x2, it had 5-miles on it when I bought it. It now has 80k on it & I'm just putting my first set of tires on it.