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From: carlson@ssc-vax.UUCP (Lee R Carlson)
Newsgroups: net.auto
Subject: RE: RE: more oil discussion
Message-ID: <518@ssc-vax.UUCP>
Date: Thu, 15-Sep-83 12:12:52 EDT
Article-I.D.: ssc-vax.518
Posted: Thu Sep 15 12:12:52 1983
Date-Received: Fri, 16-Sep-83 23:07:02 EDT
Organization: Boeing Aerospace, Seattle
Lines: 36

Vern,

Points well presented.  No one will dispute the superior viscosity stability
of synthetic based oils.

Apparently ARCO (syn -> synthetic) is about to produce, or is already producing
a new synthetic based oil.  My "inside source" was repeating comments he
gleaned from the technical people at ARCO.  One would hope that Marketing
talks to Technical, but is that always the case??  The statement was not
meant to defame ARCO but was questioning their 25,000 mile change interval
stated on the can.

SF-CC, correct you are!  Spark ignition engines have no requirements for
CC or CD or C"anything" oil qualifications.  I was generalizing.

My friend's department conducted an interesting survey of "over the counter"
oils.  Through the company's 130-odd training centers, employes collected
sample cans of oil from local retailer.  They purchased cans of oil
as normal consumers.  The collected some 250 cans of oil representing 
100+ brand names.  Analysis showed that the oils marked SF-CC ranged from
straight mineral oil (!) to exceeding the marked specifications.  They
are using these data to try and get oil industry cooperation in meeting
the label specifications.  If this does not produce the needed results,
they will forward, as you suggest they ought to, the data to the FTC.
He says that a lot of small refiners produce exceptionally good products,
but that the problems were generally with smaller fly-by-night producers.
Sort of a "one bad apple" situation.

BTW, the FAA and Lycoming (or Continental) have certified an Amsoil
av-oil for use in recip. aircraft engines.  For those of you not
familiar with small aircraft cold starting operations, some winterization
kits pump av-gas into the oil sump to thin it out for starting.  As the
engine warms up, the gas evaporates.  Synthetics should go a long way to
solving that problem!  I have no data on change intervals for the av-Amsoil.

Lee R. Carlson - Boeing Aerospace - Seattle - ..uw-beaver!ssc-vax!carlson