Come on now, " completely wrong oil ", lets not overstate it. 20w50 is
the oil weight recommended right in the owners manual for my 87 when
outside temps are consistently exceeding 70 degrees F, along with 15w50.
10w40 is listed for colder temps up till 70 degrees. If you choose to
use 10w40, go ahead, it will not make the engine explode in any case. My
wife and I have had superb engine life and good fuel economy and are
over a million miles of driving mostly German vehicles using mostly
Mobil 1, 15w50.

Mark

David Kao wrote:

> --- "John Connolly, Aircooled.Net" <john@AIRCOOLED.NET> wrote:
>
>
>>I strongly suggest you guys read this (it's very long).
>>
>>
>
> http://ferrarichat.com/forum/faq.php?s=178c489d1c02c5693b21a9ce72762eb1&faq=haas_articles#faq_motor_oil_basics
>
>>John
>>Aircooled.Net Inc.
>>362 West 6100 South, Unit A
>>Murray, UT   84107
>>
>
>
> Copy and paste a few words from this article. Make very good sense to me.
> I am now totally convinced that 20w-50 oil is a completely wrong oil to
> use in Vanagon engines. Thanks to John for his pointer to the excellent
> article:
>
>