Another update, after an unsuccessful deer hunt it was time to go elk hunting. The weather turned south and snowed about 6 inches and thick fog that you could only see 50 yards, Jeep did great running around with 10 psi in the tires and lockers loaded and ready, had to use both front and rear winches after sliding into a rut on a sidehill, worked perfect to keep me out of a two foot deep rut. Engine is flawless, but now the issue is trying to keep it warm enough, driving around in the cold weather with the heater going, I was lucky to maintain 150 degrees unless climbing a steep long hill and then I would touch on 180. Looks like I am getting close to 15 mpg driving around in 4 low in steep muddy country. Last year driving the same country with the 4.0 engine I was at about 5 mpg.