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From: davew@shark.UUCP (Dave Williams)
Newsgroups: net.auto
Subject: Re: Synthetic Oils in a Manual Transmission
Message-ID: <1499@shark.UUCP>
Date: Tue, 13-Aug-85 15:34:50 EDT
Article-I.D.: shark.1499
Posted: Tue Aug 13 15:34:50 1985
Date-Received: Mon, 19-Aug-85 06:14:54 EDT
References: <704@ihopb.UUCP>
Reply-To: davew@shark.UUCP (Dave Williams)
Organization: Tektronix, Inc., Graphic Workstations Division
Lines: 25

In article <704@ihopb.UUCP> spear@ihopb.UUCP (Steven Spearman) writes:
>Well, it is about time to replace the manual transmission fluid in my
>84 Honda Civic, and lo and behold the transmission fluid in this car is
>supposed to be 10w-30 or 10w-40 engine oil.  Now I have gotten to 
>thinking, since I am using Mobil-1 in the engine and am very
>impressed with it, why not put it in the transmission too?

I use to own a Honda Civic and thought the same thing, so I replaced
the 10-30 oil with a 10-50 synthetic. The shifting action of the trans
suffered and the gears would grind every time I shifted unless I double
clutched it or shifted real slow. It turns out that a certain amount of
friction is required by the synchro rings in order for them to work
properly. I changed back to good old 10-30 detergent oil and the problem
went away. While the synthetic gave me about 1 mpg when I used it in the
engine, there seemed to be no benefit to using it in the transmission.
-- 


                                    Dave Williams
                                    Tektronix, Inc.
                                    Graphic Workstations Division

    "The 6000 Family"
"The workstations that made
    Wilsonville famous."