I am surprised that you would have the oil light on at idle without the
oil pressure warning buzzer sounding at near 2,500 rpm. Sounds like the
high pressure switch was disabled by shorting its wire to ground.

Either oil pressure warning signal could be due to a malfunction, but
since it is only giving a warning after a high speed run, my guess is
something is really wrong. The cause is either the engine bearings
and/or oil pump is getting tired causing low oil pressure after the oil
gets hot. It is possible that the oil is getting too hot due to a
cooling system problem such as a bad oil cooler or poor water flow to
it. If the oil level is too high, this will cause excessive heating and
aeration of the oil also causing it to get too thin. Remember, the top
mark on the dip stick is not the full mark. It is the maximum do not
ever exceed no matter what mark. Oil temp and pressure gauges show the
best oil level is from the lower mark to ~half way.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
Of Jere Hawn
Sent: Thursday, March 24, 2005 1:44 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Oil Light Question

Hi All,

The van is running! Now the oil light comes on when I come off the
freeway
from 70 mph after a 25 mile trip.  I can rev the engine up and the light
goes off.  Then after a minute or so of slow driving I can let it idle
with
out the light going off.  This happened when I used that cheap Wal-Mart
oil.
I changed it and the problem went away.  This time I have Castrol 20-50
in
it with a Phram filter.  I just got a few filter in from Bus Depot and
will
be changing them our.  The question is why is the oil light going off in
the
first place? Oil too thick and getting stuck up in the engine or too
thin
because it get too hot or is there something else?????

TIA

Jere

90 GL/Carat-a-version

(latest addition are the Carat alloy wheels)