The way I read your posting, it said that the light/buzzer do not come on
until you are OFF the freeway, not at speed ON the freeway.  I think the
freeway miles and speed just heat up and thin out the oil so there is less
measured oil pressure.  Then when the RPM go down under 2500, and you are
accelerating, the combination of low RPM and low oil pressure set off the
$%&@* buzzer.  With me it is very predictable if I don't insist on 20-50
oil, even in Winter.

I'd say that if you are using 20-50 oil now, then there is likely a problem.
Else put 20-50 in and see how it acts.

Tom Salicos
'87 Westy Syncro

> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
> Of Sharon Mendonca
> Sent: Friday, January 28, 2005 12:38 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Oil light buzzer/archives
>
> Is it just me, or is there trouble retrieving information from the
> archives? I was unable to get into them at all, other than the first
> page.
>
> We have usually had problems with the oil light buzzer on our 88 Vanagon
> GL after we drive quite a ways up a mountain/hill.  We have always just
> stopped, turned the engine off, and then restarted with no problem.
> Now, whenever we drive on the freeway about 20 miles or so (flat, level
> area), at normal freeway speeds of about 65, it always starts buzzing
> about 1 block off the freeway - going and coming home.  Any ideas on why
> this happens?  This has happened quite a few times in exactly the same
> areas and distances.
>
> Bob & Sharon Mendonca
> 88 Vanagon GL
> 88 Westy