spear@ihopb.UUCP (Steven Spearman) (08/08/85)
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 seem to recall this being discussed before, but I'm not sure. Any reason why you would not want a more-than-normally slippery oil in a manual transmission? If you would be so kind as to mail responses to me, I'll summarize. Thanks IA Steve Spearman ihnp4!ihopb!spear
davew@shark.UUCP (Dave Williams) (08/13/85)
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."