Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 (Tek) 9/28/84 based on 9/17/84; site shark.UUCP Path: utzoo!linus!philabs!cmcl2!seismo!harvard!talcott!panda!genrad!decvax!tektronix!orca!shark!davew 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."