I think you've got to consider that the new engines are more precision
built with proper clearances and some techno goodies that older engines
aren't going to have.
Consider that a Seiko watch is never touched by human hands in the
production process (it is said).
It is possible that they run the engines in before they get installed and
the break in oil is dumped and replaced with the Synthetics before they
are installed.
I can absolutely tell you that new engines fail too.
I have personal knowledge of vehicles owned by family members who have
had big problems with Nissan, Land Rover, Lexus, Cadillac, Lincoln, Dodge
and Ford trucks that have resulted in major expenses that are engine,
timing belt, valve train related, plus lots of oil leaks and digital
instrument failures.

Stan Wilder
83 Air Cooled Westfalia

On Sat, 27 Apr 2002 19:57:05 -0400 Clarence J Falarski
<lamont@MINDSPRING.COM> writes:
> I have heard all the opinions on breaking in  new engines
> on synthetic motor oil, some pro some con. Most people feel that you
> should wait somewhere between 5 and 15 thousand miles until the
> rings set  properly.
>
> There are however a couple of high end automobile companies that
> install synthetic motor oil at the factory in their new automobiles
> and who's engines never see anything but synthetic oil, one is
> Porsche the other I do not remember.
> Perhaps they know something we don't.
> clarence.
> 1990 multivan
> North Carolina
>

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