Re: Real MPG (2010)
If you are going WK, hemi is the only way to go. the Hemi gets similar mpg to the 4.7 and is a far better powerplant, plus there are numerous Hemi upgrades out there that make it much more responsive and improve mpg. I get 21 HWY now, but just 17 stock. What few pennies you same with a 3.7 at the pump are really not worth it if you compare the night and day difference in the driving experience.
2006 GC Overland QD II
5.7 Hemi, Modern Muscle 85 mm CNC ported TB, Apexi super voltage stabilizer, Billet Tech. Catch Can, Koni FSD shocks/struts, SRT8 sway bars, Cooper AT3's, Amsoil fluids, Diablosport Intune CMR tuned by Hemifever tuning.