You might google it--I've heard you don't want to switch to synthetic on an
older engine, so you either run sythetic from the go, or you stick with
normal.  I do like the Mobil 15-40 blend though, not sure it makes any
difference other than it makes me feel like I am taking better car of my
engine.

>From: gary hradek <hradek@YAHOO.COM>
>Reply-To: gary hradek <hradek@YAHOO.COM>
>To: vanagon@GERRY.VANAGON.COM
>Subject: Switching to synthetic oil
>Date: Fri, 8 Jun 2007 09:19:28 -0700
>
>Jay,
>      I am not so sure that synthetic oil is cost
>effective here.
>I use synthetic in my turbo passat because it runs
>hotter than the vanagon and you can smell how it burns
>the oil.   To me the best thing you can do for the
>vanagon is change the oil every 3k with what ever oil
>works best and that will be expensive if you run
>synthetic.
>       gary
>ate:    Fri, 8 Jun 2007 06:57:51 -0400
>From:    Jay Brown <badkarma@TTLC.NET>
>Subject: Switching to synthetic oil?
>
>I am thinking about switching over to a full Synthetic
>(Castrol Syntech
>5W-50) from regular dino oil (Castrol GTX 20W-50) in
>my '85 Westfalia.
>Are
>there any special precautions I should take when
>making the switch?
>The van
>doesn't currently leak any oil and I haven't had any
>oil pressure
>troubles,
>I would just like the extra protection that the full
>synthetic claims
>to
>offer.
>
>Thanks in advance.
>Jay Brown
>'85 Westfalia
>'72 Riviera
>
>
>
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