Friends,
    Your not going to believe this.   For the past
3 months I've been driving my Vanagon with
the oil light on at idle, buzzer going off at
about 2,000-2,200 RPM.  Clearly an oil pressure
problem.  Four years ago I had this problem
because of over heating.  Little by little
each year this has been getting worst.  Now
head gaskets are leaking, and it needs a
rebuild, so I though I would drive it for a while
change the oil and check to see the contents
of metal in the old oil.  Well the oil came out  like
water: thin and splashed like water.  Careful
examination turned up nothing.  Oil was black.
It has 2,000 mile on it........The light bulb went on!!!!
FUEL  leak!!!!   Yep! I've got a bad fuel injector
leaking fuel into the engine.  20-50w was  installed
and no more oil pressure problems, for now.
But in a few weeks, after the oil get a good
dose of fuel I'm sure I'll have this problem again!

Add this to the list of things that cause premature
engine oil trouble!  I will be testing the fuel injectors
this weekend.....
                                            Eric