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From: heneghan@ihuxa.UUCP (Joe Heneghan)
Newsgroups: net.auto
Subject: Multi Viscosity Oil
Message-ID: <661@ihuxa.UUCP>
Date: Tue, 25-Sep-84 11:53:04 EDT
Article-I.D.: ihuxa.661
Posted: Tue Sep 25 11:53:04 1984
Date-Received: Wed, 26-Sep-84 19:52:19 EDT
Organization: AT&T Bell Labs, Naperville, IL
Lines: 20

Oils can be made many different ways but most are made with two
additives, a viscosity index improver and a pourer depresant usually
among others. These two tipify additives used for multi-grade. The
idea here is that you want the oil to flow under a range of
temperatures. Oil behaves like ball bearings- minimize friction.
Lawn mowers, boat engines and other special engines can use single
grade. Some diesels shouldn't use the multi. But I'd be careful
about making a claim against an auto manufacturer when useing
single grade oil. You can use a heavy weight in the summer and a
light weight in the winter if you want.

Let's talk about WWII for a point of reference, correct me if I'm
wrong, but a famous battle was won partly due to the fact that
the Germans used heavy oil in the middle of winter and...
RAAAA-RAAAAA-RAAAAA-RAAAAA, their engines wouldn't start.


I would summarize by saying oil is application specific. We can say
without reservation that multi-grade oil is user freindly and
auto makers seem to like it in their engines.