Karl,

Thanks for your advice.  Might try the single weight approach. A local VW
shop that has been around for many years said to stretch the relief spring
and put a can of STP (yeah, I know) on top of the Mobil 1 15W-50.  If no
improvement after these steps then they recommend installing a pressure gauge
to det. actual oil pressure after warmup.

BTW, They have a 87 Westy with over 300k on the original engine.  Looks junky
enough inside and out to have that kind of mileage.

Bill