Drove 19 hours from just north of Flint Michigan to Daytona Beach, FL, straight through.
According to the EVIC, I averaged 20.0 mpg for the trip (up there, from Flint to the UP, backwoods UP, back down to Flint, then Florida). I don't think that's half bad.
The dog enjoyed the extra room, compared to the old Colorado.
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Overall, much success! Put about 3600 miles on it over the week, on top of the ~2500 I'd put on since I did the last oil change. So that's about 6000 miles on the oil, which now looks like it's time to change, and is half a quart down. I can live with that, my Colorado would be half a quart down at 3500 miles and GM considered that to be 'normal'. Off to the store for some more Mobil 1! I figure I'll run 4500 mile intervals on it, as it still looked honey-colored around that point.
I must say, this is a much better highway cruiser than the old pickup was. Other than being stiff, I didn't really hurt anywhere and wasn't super tired other than my eyes. The old pickup usually resulted in a sore back and me being utterly exhausted if I tried a straight-through run. It's also better off-road, at least maneuverability wise. We put it in places I'd have never gotten the pickup. Although I do miss the G80 locker the pickup had, I wouldn't have required a tow up that sand hill if I'd had it. The Jeep tends to stop when a front and rear tire aren't really touching the ground (man that's an interesting sensation to have in a vehicle).