2004 Wj 4.0 245-75R16 skids, IRO sliders, reciever hitch, cut fenders aproximately 13.5 combined. Best ever on highway was 16.5 and worst in town 9.5. The overhead generally gives me around 13.? in town and 15.8 or so highway. iPhone app is just slightly less.
*edit* hilly AZ/NM highways at...