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I think your friends have it backwards! Natural oil contains chemicals which cause rubber to swell and distort. In the early days of synthetic oil, these chemicals were missing and the rubber seals which shrink, causing oil leaks. Somewhat recently (last ten years or so) synthetic oil manufacturers started adding swelling agents to keep rubber parts swollen to help prevent oil leaks. I'm sure you've heard of people adding synthetic oil and developing oil leaks - this *used* to be why, and it isn't much of a problem anymore.
One thing to be aware of: I've heard from several sources that Castrol Syntec does not have enough zinc content. Something about zinc is good for turbochargers, and many people warned me away from Syntec in my turbocharged cars. I've stuck with Mobil 1 and Amsoil for several years, and been happy... OTOH, my Alfa wants nothing but Syntec... oh well!
I'm sure others on this BBS will have more info... especially Dick from Falls Church - he knows his stuff...
-Justin
Posts in this Thread:
- Synthetic oil WORRY, 88spg, Sat, 10 Feb 2001 21:32:01
- Re: Synthetic oil WORRY, BobS, Sun, 11 Feb 2001 20:56:24
- Re: Synthetic oil WORRY, Kevin K
, Sun, 11 Feb 2001 17:58:29 - Re: Synthetic oil WORRY, Sean, Sun, 11 Feb 2001 12:15:45
- Re: Synthetic oil WORRY, Dick in Falls Church, Sun, 11 Feb 2001 11:53:25
- Re: Synthetic oil WORRY, Don
, Sun, 11 Feb 2001 11:51:22 - Re: Synthetic oil WORRY, PatO, Sat, 10 Feb 2001 22:31:21
- Re: Synthetic oil WORRY, Bill N, Sat, 10 Feb 2001 22:21:19
- Re: Synthetic oil WORRY, Justin VanAbrahams
, Sat, 10 Feb 2001 22:07:19 <-- Viewing This Message
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