Re: Illicit Pleasures.

["pcsolutions" <pcsolutions@mindspring.com>]

From: jcl0004@ibm.net To: thoimre@ibm.net Cc:jag-lovers@sn.no
Subject: Re: Illicit Pleasures.
Date: Monday, February 10, 1997 11:18 PM

> As per recent thread (Oct 96ish) on "snake oil" (slick 50 et al) an
> engine can run for quite some time without oil (hours) before
seizing.
> If  you want a copy of the FAQ mail me offline (it has been
distributed
> a number of times on this list). John '84 XJ6

This where I get really confused.  I have seen the faq, and I have
seen the commercials on U.S.TV which show an engine being put through
their version of a torture test.  Those engines seem to run for long
periods of time with no oil in the crankcase.  I have also noticed
none of those engine were connected to a   ny type of load.  I have
also seen mechanics who got in a hurry and forgot to put oil in the
crankcase of a car and the rods were knocking on the crankpin by the
time they drove the car out to the parking lot, around the building
and back in their bay.  Those bearings _never_ recovered from adding
the oil back to the crankcase and the engine had to have the crank
polished and the bearings/inserts replaced.  I know that zinc both in
the oil and in some addatives seems to help with heat and lubricity,
but I really don't see how an engine can exist for hours or even
minutes under a load wothout oil.  Brief periods of oil starvation
from accelerations or hard cornering is acceptable and to be
expected, but to say an engine can live without oil just doesn't hold
true in my experience.

One of the worst cases of oil starvation I have ever seen was when a
customer who did not replace the oil or filter on his (then) new 1989
IROC Camaro.  He had his car towed to the dealership to be repaired. 
The factory GM oil filter is black and can not be obtained otherwise,
the filter on this car was black, one that you or I could buy would
be blue (Jags are the same way, the factory filter is one color and
the ones we can buy are a different color.)  When the oil pan was
pulled the oil that remained in the pan was black as coal and looked
alot like warm jelly.  The bearings had been pounded out of the rods
and looked alot like pieces of leaves or maybe thin paper.  The
bearings were heat welded to the rods and crank and even the wrist
pins were blue with heat damage, not a single rod could be removed
from the crank.  Not a single rod was broken, which amazed me...
quite a bit.

Tim

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