So...I might or might not make it to Moab. I got about 2 or 3 miles from the junction where I shift highways and begin to go south rather than east, and my check engine light came on for no apparent reason. She runs fine; no unusual sounds or behavior. She ate about 3/4 quart of oil from Spokane to Missoula, as I've found is usual for highway driving, but that shouldn't effect anything so long as I keep an eye on it and continue to fill her up. So I'm stuck in Butte MT for the night, since there are no auto shops open on Sunday to check my code...