Review on the new 7.3 Ford V*

We bought a new Entegra Class C in December. Has the 7.3 motor. Only have 1,500 miles on it thus far but I am impressed with its power. The RV is almost 27 feet long and is 11'8" tall. Weighs almost 11,600lbs, with a GVWR of 14,400lbs. As a result there is considerable weight and wind resistance on the highway. I do not exceed the speed limit, and generally cruise at 65mph on the highway. Mileage has been about 9.5mpg. Towed a 4,ooolb car about 180 miles and still got just under 9mpg (all flat land thus far). Taking it out west this summer and will be towing a small car. Hoping to see 9mpg, but I know the mileage will drop in the mountains.
Overall the 7.3 motor has plenty of power for this size rig. I imagine it will be more than adequate in a smaller rig.