If the fluid is thick and black it is ruining the parts. It gets that way by absorbing moisture and corroding the innards of the system. The best thing you can do now is to try to flush it out THOURGHLY and use Castrol GTLMA DOT 4. It seems that it is the only one that is recomended for use in British cars. It is also supposed to be flushed out every 2 years in the clutch AND the brakes. I suggest you try to remove as much fluid from the master cylinder an possible and then fill with Castrol flushing and bleeding each caliper and slave cylinder until the fluid runs clear with no dirt or air. David Teitelbaum vin 10757 --- 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,