Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/18/84 exptools; site ihu1e.UUCP
Path: utzoo!watmath!clyde!cbosgd!ihnp4!ihu1e!grd
From: grd@ihu1e.UUCP (daly)
Newsgroups: net.auto.tech
Subject: Re: What motor oil should I use?
Message-ID: <558@ihu1e.UUCP>
Date: Tue, 26-Nov-85 14:29:24 EST
Article-I.D.: ihu1e.558
Posted: Tue Nov 26 14:29:24 1985
Date-Received: Wed, 27-Nov-85 06:10:05 EST
References: <561@ihwpt.UUCP> <2435@cal-dbb.fluke.UUCP> <822@whuxl.UUCP> <322@mhuxl.UUCP> <1337@ihuxm.UUCP>
Distribution: na
Organization: AT&T Bell Laboratories
Lines: 17

After doing extensive research for a major oil company in heavy oils, I can
say that the number one ingredient is NOT viscosity in oils.  Viscosity can
be thought of as a catalyst as it helps the oils keep their lubricative
capabilities.  E.P. additives (Excessive Pressure), constitute what will
make or break a given oil.  I am not saying that you shouldn't look at
viscosity when buying engine.  I use 10W-40.  The 40 weight works well in
the summer and the 10 weight works will in the winter.  I also change my
oil at approximately 3,000 mile intervals and have many cars that go
well over 80,000 miles without engine overhaul.  I feel the automakers are
misrepresenting the facts on oil changes.  Its true that base oils will
not break down in 3,000 miles and probably last to 7,500 miles, but what
they don't tell you is that the additives will NOT last that long.
So in summary, I recommend running year round with a name brand 10W40 oil.
I don't use 5W oil because this could lead to problems during the summer
if the viscosity agent breaks down.

                                 Garry Daly -- ihu1e!grd