I have used Dot 5 since about 1982. I have not had any problems! Bill Lane vin 3635 "jtrealty@xxxx" wrote: > The reason for the change of the brake fluid is that the origional > fill was girling dot 3. It was assumed that that would also be the > replacment fluid. Brake fluid is hygroscopic ie: it absorbs moisture > from the air. If you don't regularly drive the car and heat up the > fluid to drive out the moisture it will corrode the aluminum cylinder > bores. If you go to Castrol "GTLMA" you can probobly go alot longer > than 2 years but it is cheap insurance. > The reason your master cylinder is failing is common. The flush > washed out all of the crud that helped seal the corroded bore. It is > very likely that you will wind up rebuilding all 4 calipers also. If > you have a 5 speed don't forget the clutch fluid which is the same and > subject to the same problems. Many people have gone to silicone or dot > 5 but it isn't recommended for several reasons including, water won't > mix with the silicone so if any is in the system it will eat up the > cylinders. > David Teitelbaum > vin 10757 > > --- In dmcnews@xxxxxxxxxxx, "Lynn Metz" <metzlynn@xxxx> wrote: > > Group: > > > > I was just wondering why the owners manual suggests changing the > brake fluid > > so often and why so many list members emphasize this as well? Is > this just > > being extra careful or is it really needed. For example, my daily > driver, > > Firebird, has over 130,000 miles (12 years old)- brake fluid never > changed - > > never any problems. Now, I drained and replaced brake fluid this > summer on > > the DeLorean and now, about 300 miles later, the master is going > out. I > > assume the new fluid was too much for the old rubber in the master. > (Or it > > could be a coincidence) > > Brian 16584 > > > ______________________________________________________________________ > ___ > > Get Your Private, Free E-mail from MSN Hotmail at > http://www.hotmail.com. > > > > Share information about yourself, create your own public profile at > > http://profiles.msn.com. > > Before posting messages or replies, see the posting policy rules at: > www.dmcnews.com/Admin/rules.html > > To address comments privately to the moderating team, please address: > moderator@xxxx