A: That's Dot 5 fluid. Dot 4 has a higher boiling point plus additives for ABS computers over the Dot 3. FWIW, I suggest only using Castrol GTLMA (low moisture absorptive) with real rubber seals. Especially if you have a Jeep with the manual clutch cylinder made by Girling (says right on it to use only the GTLMA) When you put the other stuff in them, the seals tend to fail in 6 months or less (even on the brand new master cyls we sell!) Directions in the box for the master cyl say to use only the GTLMA or equivalent. From: d stohler <das24rules@xxxxxxxxx> Subject: [Amc-list] brake fluids To: amc list <amc-list@xxxxxxxxxxxx> Message-ID: <717650.43274.qm@xxxxxxxxxxxxxxxxxxxxxxxxxxx> Content-Type: text/plain; charset=iso-8859-1 i have heard that if you use the dot 4 (i beleive) silicone brake fluid in a regular dot 2 or 3 system, it will eat out all the rubber seals. i dont want to use the silicone fluid. but what about the other way around. i have a master cylinder from a military hummer. brand new. not rebuilt. we use the silicone fluid. does anyone know if there are problems using regular dot 3 fluid in a silicone suited m/c?? i hope not cause i didnt even think about that till after i blead the brakes and have had it on for about 3 days now.... oops, shoulda thunk a that earlier?? lol. dave stohler http://picasaweb.google.com/das24rules _________________________________________________________________ http://newlivehotmail.com _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://www.amc-list.com/mailman/listinfo/amc-list