Premium is $6 in Tahoe and I'd prefer not to spend it if I can get away with it. Sounds like I can get away with at least 89 so I'll start with that. It's run great up there previously on short jaunts, always on 91. But it'll live up there now, and we have an Outback for the long trips down the hill so this will just be local.

Thanks all for the input.