So far everything you're mechanic said is pure crap.
Synthetics were developed to handle applications of very high
temperature.
I'm not going to try and give you everything thats in Motor Oil 101 but
if your mechanics lips seized that would be OK.

Stan Wilder

On Thu, 11 Apr 2002 17:47:06 -0400 Jon Sykes <jon.sykes@PS.GE.COM>
writes:
> I was talking to my mechanic the other day and we got onto oil.  We
> were
> talking about VW vanagon diesel engines and he said he beleived the
> engines
> would get much higher milage between rebuilds if they used 'real'
> oil.
> Something about oil being taken out lower in the refining process
> and not
> using the additives to make up for what had been lost.  He said the
> only
> 'true' old-fashioned motor oil was a brand made by Kendall.  Seemed
> to make
> sense in some way - oil does contain lots of additives which
> essentially
> provide the viscosity extent.
>
> He also mentioned synthetic oil and how it drains of moving parts
> much
> faster than regular oil.  Said he let an racing engine (that had
> been run on
> synthetic) sit for a while and when they restarted it it seized.
>
> ...any truth in any of this?
>
> ---
>
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