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!burl!ulysses!mhuxr!mhuxn!ihnp4!ihu1e!grd
From: grd@ihu1e.UUCP (daly)
Newsgroups: net.auto.tech
Subject: Re: MOBIL 1 info. request
Message-ID: <559@ihu1e.UUCP>
Date: Wed, 27-Nov-85 09:42:25 EST
Article-I.D.: ihu1e.559
Posted: Wed Nov 27 09:42:25 1985
Date-Received: Thu, 28-Nov-85 04:24:59 EST
References: <711@drutx.UUCP>
Organization: AT&T Bell Laboratories
Lines: 27

> 
>  
>  
> Having paid an arm and a leg for an oil change using MOBIL 1
> synthetic motor oil, I am curious about how long this stuff
> really lasts.  I purchased the 5W-30, which is working nicely
> with the weather I've been experiencing (15 degrees F).
> However, the owner's manual recommends that 5W-30 be used
> only up to 60 degrees F.  Does this mean that I should change
> the oil next summer?  MOBIL states that the oil is good for
> 24,000 miles or one year (whichever comes first).
>  
> What do YOU think?
>  
> drutx!grl		Randy Lyman
>  

I wouldn't know.  From the tests I've run on synthetic oil, I've
found that they have WORST lubricative capabilities as compared to
other pertroleum base stocks.  What makes these oils better is the additives
they add to the oil.  Sythetic oils do withstand higher and lower temperature
ranges as NASA does use them but they do not have the lubricative capability
as does base stock oils.  All in all, the synthetics will last as long as
the additives will.  I would get an in writing guarantee of full replacement
of my engine before I would stick this stuff in my car.

                                  - Garry Daly ihu1e!grd