Well, we made it to Alberta in 10 hours, averaging 74.3 mph. For most of Idaho (except near the cities) I had the cruise set at 80 mph; just 5 over the limit. For most of Montana (again, except around the cities) I had the cruise set at 85. Technically, the speed limit in Montana is 75, but we didn't see a traditionally marked police car for any of Montana's 400 miles.
Now, brace yourself; my first tank of fuel averaged 28.4 mpg. My second, which took us from Idaho to Montana on some really twisty roads at 7,000 ft. above sea level averaged less than 23 mpg. The temp. was about 35 F, we were loaded down with 1,200 lbs. of people and cargo, and we were cruising at 85 mph. But still, I expected a little better than 23. Oh, well.
So there you have it... oh, my last tank of fuel took us all the way to our destination in Alberta, where I filled the tank with 47.56 liters of fuel... you Canadians... how empty was my tank?! I think I about coasted into the station.
We'll be heading mostly downhill on the way home, so I'm hoping for some better mileage on the way back to UT. I'll keep you posted.
Chris