I have a friend with a 1990 Subaru Wagon (since new). He says he never shifts below 5000, and just simply loves to hear it at 6500 (and higher, often). He has 175,000 miles on it. It does not burn oil, and seems to run as new.
I think you can probably pick any shift point you want and your motor will still outlast your vanagon.
Tom
PS. A local mountain pass, where my 2.1L could barely muster 50MPH, the Urabus climbs at 65mph
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