[skyking]

Originally Posted by aerohead

I wrapped my head in plaster of paris so as not to ruin my hat size!

That was a fine theory before the facts of the load, and steady state performance. Real world? I am getting ~13 MPG on these mountains and also driving considerably faster while doing it. The downhill slide across Nebraska will be far better, and the lower speed limits in Illinois and Ohio will force some economy into the trip.
We had a terrible leave. Not nearly enough of her friends showed up to help and she suffered from too much retail therapy. In the end she had to give away some more stuff and the car and every nook and cranny are stuffed. If I find an easy truck scale I will scale it, but my eyeball has it at about 15,000 CGVW.
The truck performed as expected. I could hold 70 on almost all hills and got caught a handful of times down to 60. I passed a lot of trucks uphill but was passed by far more on the downhills. I never went to 4th gear and just lugged those 60 mph steeps in 5th, direct drive.

Currently we are in Rock Springs WY, @~6400 MSL. The weather has been superb, but windy.