Try 40 weight.  Should make a big difference.

I know I'm going against the flow here, but if you look at your owners
manual, lighter oils are only good for around 60 or 70 degrees.  the chart
only goes to 100!

When my '85 had as many miles on it as you have, I used either straight
fifty or even 60.

Karl Wolz

----- Original Message -----
From: "Bill Thomas" <Bithomas707@AOL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Monday, April 01, 2002 2:55 PM
Subject: Flickering Oil Light on 83.5 Westy

> The oil light on my 83.5 Westy also flickers occasionally at idle after it
> warms up.  I run Mobil 1 15W-50 and use Mann filters.  I have 176,000
miles
> and I have replaced the oil pressure bypass plunger and spring and also
> replaced the sender unit.  I did not see the responses to Mike's message
so
> any assistance is appreciated.
>
> Bill
>