Just a quick question about RPM's and my '87 Westy.  I'm doing about 3500 at
60 MPH, 3750 at 65 and 4000 at 70.  Does this seem appropriate?  What would
cause any variance from one vehicle to another?  Is it OK to push the van to
4000 continually on a long trip?  It's still at the top end of the green.

Gerry