Maybe these are obvious, but hydarulic fluid, antifreeze, water (for drinking and mixing with antifreeze) and basic tools. I've also heard of people carrying extra voltage regulators too. AAA membership. Maybe a radio, too, I don't know how empty it gets up there, but it's probably safe to say you won't have cell phone coverage. Fuses.

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1983 240D 3.0T 4-speed manual, now sold

1989 Subaru GL Wagon 5-speed Touring Edition