If the clutch cylinder is leaking that means the interior is corroded from moisture. When the seals pass that part of the cylinder it tears the lip up and then it leaks. By substituting a higher viscosity fluid you only delay the inevitable. It is not good to drive on a bad clutch cylinder (master or slave). You will damage the roll pins on the 1-2 shift rail and possibly break the pivot bolt in the linkage. It sounds like you have found a temporary solution that can "get you home" but I would not leave it like that. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, "bitsyncmater" <david.mckeen@...> wrote: > > --- In dmcnews@xxxxxxxxxxxxxxx, "rodney rael" <rodrael1@> wrote: > > > > Hey all!. > > > > I had a clutch master cylinder leak, (oil under driver's side floor > mat) it > > would all leak out in about 1 week or thereabouts. Anyway, I was > thinking > > I was going to have to pull out the master cylinder and change and was > > dreading that, but I use Marvel Mystery oil for all sorts of things > and > > thought I would use that instead, since it was in my trunk and I > didn't have > > any extra brake fluid. Not only did it work, but my leak stopped. > > Cylinder has stayed completely full!... Clutch is working great!.. > > That's a cool discovery. We don't really need the high temp capability > of brake fluid for the clutch so why not use a fluid that won't absorb > moisture. > ------------------------------------ To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnewsYahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/dmcnews/join (Yahoo! ID required) <*> To change settings via email: mailto:dmcnews-digest@xxxxxxxxxxxxxxx mailto:dmcnews-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/