Re: Old Brake Fluid

Posted by Tim Cole On 2010/9/5 12:57:20

Dot 3, Dot 4, and Dot 5.1, don't mix with Dot 5 silicone and that is all. I have a bottle with the two mixed to demonstrate for concerned parties. They remain separate with the Dot 5 on top.

So withdraw a sample from the top of the reservoir and mix with Dot 3. If it mixes your system is pure.

Mixing the two should not harm the system. At least when I was overseas the military were always mixing the two without loss of braking. If mixing was dangerous then DOT 5 would not be allowed at all.