Brian, according to the electronic dash (Silverleaf VMSpc) the total trip mileage was 7.3 MPG. On the way out to San Diego, we had to hit it at 70 - 72 MPH in order to make up for starting a couple of days late. On the way home, I slowed down to about 68 MPH, but there are a lot of big hills between Pomona and Evergreen.
I think that the engine need to have the valves and injectors adjusted. I have no way of knowing when that was done last and the engine does not seem to be delivering the full 470 HP. Of course, I am pretty heavy. I had the bus weighed in Pomona at the FMCA show by the folks who weigh each side of each axle, and we were at 36,500. We were also towing a Dodge Durango (5,000 lbs?).
The AutoShift worked great. The engine RPM was 1300 at 60 MPH.
Eagle 20, YES, my wife was VERY happy with both the bus and not having to listen to my bitching.
During part of the trip, it got very cool in the evening. We felt so safe, comfortable, and cozy!! One of the biggest bitches I had about the motorhome was that there was almost no heat in the bathroom and it was so cold stepping out of the shower. With the bus we have an AquaHot heat exchanger in the bathroom and get it toasty for when we take a shower.
For those of you who think about giving up (I sure did!), hang in there, it is really worth it!