I am not a chemist. I can only tell you from experience ALL of the people that work on british cars using Lucas-Girling say that because of the rubber that is used for the seals in the brake system the only recomended fluid is Castrol GTLMA. While it is true that ALL DOT 4 fluids must pass the smae testing it does not mean they are all made the same. Keep looking for it and if you can't find it I am sure you can order it from someone. Try a shop that works on Jaguars, they should have some or be able to tell you where to get it. Any large store that has the Castrol line of products should be able to get it for you, it isn't that special. You could also try the Castrol website, they should be able to tell you where you can get some. Sometimes you just don't argue with experience. BTW keep some in a small bottle on a shelf so you can top off the system if you ever need a little. The bottle must be kept tightly closed to avoid moisture contamination. The brake fluid is supposed to be changed every 2 years. (and clutch fluid). You could just use the Castrol in all of your cars, it is a very good brake fluid. In may respects it is even better than DOT 5 (silicone). David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, "Jason Rowe" <rowejj@xxxx> wrote: > Well, I've went to all the local parts stores and no one has any castrol. I asked the guy > at napa if he could order some for me so he looked and said that they don't have it listed. He > then asked me why it has to be castrol dot 4 and not any other dot 4. I said good question and > I'll find out. So why does it have to be Castrol? He said that the fluid is so regulated that there > really can't be much difference between all of the brands. So what is so special about it? > > Thanks in advance....again.....................Jason #5903 > > [Non-text portions of this message have been removed]