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From: smh@mhuxl.UUCP (henning)
Newsgroups: net.auto.tech
Subject: Re: Mixing oil weights and 10w40
Message-ID: <449@mhuxl.UUCP>
Date: Sat, 11-Jan-86 14:05:22 EST
Article-I.D.: mhuxl.449
Posted: Sat Jan 11 14:05:22 1986
Date-Received: Sun, 12-Jan-86 00:36:22 EST
References: <2457@amdahl.UUCP> <1184@dual.UUCP>
Organization: AT&T Bell Laboratories, Murray Hill
Lines: 12

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From the keys of Steve Henning, AT&T Bell Labs, Reading, PA mhuxl!smh

> 	3 - Oil breaks down with ( time X high temperature ).
> 	The additives are more important than the viscosity.
> 	Use only the best grade ( SF ). Also, molybdenum add-ins
> 	work to coat surfaces and protect them during start-up 
> 	before the circulation system gets oil there.

An oil execuative told me that the multi-viscosity additives break
down ususlly in the first 1000 miles.  He prefered single weight
oils since he knew what his viscosity was for at least 2000 miles.