The Castrol Syntec 5w-50 is a very wide range oil. I know a number of folks
that use it. I have not used it extensively my self nor done any oil testing
on it. My only comments would be that it is not a true synthetic made from
synthetic stocks. It is process, (hydro cracked) from conventional oils.
They were taken to court for this but they prevailed.

I am a little bitter at Castrol as they convinced Allison to use their
Transynd ATF in their automatic transmissions. In order to maintain the
warranty on my motor home transmission, I have to use this stuff.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Jack R.
Sent: Monday, February 05, 2007 7:55 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Castrol, QT, 5W50

I always ran Castrol, QT, 5W50 Full Syntec Motor Oil; it seemed to cover me
well in the winter as well as the summer in my 1.9L WBX.

Any concerns with this oil? Other's experiences?

What is the "oil brand and weight of choice for all season application" in a
2.1L?