Multi-Viscosity oils have been around since the 70's. The better one's
have it right. Especially the synthetics as they do not need as much of
the VI improvers to cover the wide ranges. Lately I've been using the
Caterpillar S.O.S. program for testing the oil in some of my vehicles.
Regular oil sampling is a service requirement for the Caterpillar engine
warranty in my motor home. One of the test results that come back is the
viscosity at 100C. I am amazed at how the Mobil 1, 0w-40 is right on
spec even after 12k miles.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
Of Karl Wolz
Sent: Monday, February 07, 2005 9:05 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Choice of Oil

Valvoline racing oil - 30wt 3 seasons and 40 wt summer.  In Phoenix it
gets up to 115 degrees.

I don't trust that new-fangled multi-vis stuff!  Give 'em a couple years
to get it right.

Karl WOlz

> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On
Behalf Of
> Peter
> Sent: Monday, February 07, 2005 12:35 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Choice of Oil
>
> Hello,
>
> Just about to do my first oil change on my '89 Westy. PO did not use
> Synthetic so I'll probably carry on that tradition for a little while.
>
> Out of interest, what brands do you folk use in your Westies?
>
> Cheers.