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From: vince@fluke.UUCP
Newsgroups: net.auto
Subject: Re: Mobil 1 oil
Message-ID: <1481@vax2.fluke.UUCP>
Date: Fri, 19-Oct-84 15:05:52 EDT
Article-I.D.: vax2.1481
Posted: Fri Oct 19 15:05:52 1984
Date-Received: Sun, 21-Oct-84 15:20:04 EDT
References: <244@aesat.UUCP> <1396@ihuxl.UUCP>
Organization: John Fluke Mfg. Co., Everett, WA
Lines: 34


>> Also,  if  synthetic  oils  are  so  wonderful,   why   do   most
>> manufacturers   warn  that  they  will  not  stand  behind  their
>> warantees if you put synthethic oil into your engine?

> Easy. They are VERY conservative.  Petrol-based oil is well-known.
> They KNOW how it works, they know how their engines will react to it.
> Synthetics are a relative new-comer.  Their properties aren't so
> well-known.  They may be better, they may be worse.  Maybe they're
> better (than conventional oils) for some engines but worse for others.
> They haven't had time to test them sufficiently to trust them.
> Sticking with conventional oils is safe, so that's what they do.

Synthetic oils are not as new as you may have imagined.  A friend who
is an aviator informed me that synthetic oils have been used in planes
for ages (I think he said decades).  Synthetic oils (which brands I
don't know) are approved by both the FAA and aircraft engine manufactures
for use in most if not all aircraft.  This is a VERY CONSERVATIVE
industry.  If there were any doubt at all about its reliability, it
would not be approved.

I was certainly impressed by this fact before I began using Mobil 1 in my
car.  I am convinced that most cases where synthetics are discouraged are
because of ignorance or because of alterior motives (would like to sell
you more service).

Perhaps if there are some fellow netters out there who know more about
the aviation end of things, how about filling us in?

	Craig Johnson			uw-beaver!	\
	John Fluke Mfg. Co., Inc.	decvax!microsof!  \
	Everett, Washington		ucbvax!lbl-csam!    >  fluke!vince
					allegra!	  /
					ssc-vax!	/