As I'm sure you've heard by now, most people recommend Castrol GTLMA (Low Moisture Absorption) brake fluid. If you can find it, you might try that instead. To answer your question, at first I couldn't find the Castrol so I also bought the Valvoline SynPower fluid to flush my clutch system. That was 4-6 months ago and I've had no problems. Out of paranoia I have checked my system a couple of times per month since I put it in. I'm not bashing a vendor but do you know if the parts Houston sent were NOS or "new"? I wonder what happens to the rubber components after sitting for 20+ years. That may or may not have anything to do with it. Good Luck, Rich A. #5335 --- In dmcnews@xxxxxxxxxxxxxxx, "Palatinus, Joe" <jopalatinus@xxxx> wrote: > Hello List, > 2 years ago I replaced both my master and slave cylinders with new ones from DMC houston. About 6 months ago I noticed my master cyliner leaking by my foot, and the clutch fluid decreasing. I purchased a new master cylinder from grady, and a new slave cyliner from specialtauto, so i would have them on hand and waited until christmas break (now) to change cylinders. I just changed the slave cylinder, and started on my master cylinder, I noticed the fluid in the master cylinder resivoir has turnned to a black jelly. There is quite literally 1 inch of just black thick gel mush in the resivior. I had changed fluid when I changed cylinders previously and used valvoline synpower (DOT 4). Was this the cause of my premature failure? Had I waited too long to change the fluid (2 years)? I have the SS braided clutch line, and a fuel grade line that runs from the resivoir to the master cylinder, so I would not suspect contamination from the hoses. I went and bought 2 bottles of valvolineABS (exceeds DOT 3 and DOT 4 standards) fluid, but I am not sure I want that fluid in my clutch system now. Do other people use this fluid for their clutch system? > Thanks > Joe P. > VIN 17167 6808 > > > > > [Non-text portions of this message have been removed]