Quote:
Originally Posted by TAG UR IT
Here's everything you need to know about brake fluid.
I run superblue DOT 4 in mine. I got one can and it worked just fine. If you go DOT 5.1 you should expect to change it out a lot more often (which can become a pain in the butt) than DOT 4 or even standard DOT 3.
Click on the link and it'll give you everything you need to know.
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The change interval for DOT 5.1 is no different than DOT 3 or 4, although 5.1 does have a higher borate ester content. But that alone does not have an appreciable affect on its hygroscopic properties. Also, 5.1 is typically slightly denser (contains less dissolved air if packaged properly), meaning it is less compressible right out of the bottle.
A lot of people recommend the blue fluids, but I will not use it as they stain the master cylinder reservoir.
This link will have more details on brake fluid (simplified for those who aren't chemical engineers) than any I've found:
http://www.rs683.com/abc.html