Which Brake Fluid For Road and Track?

[Matty]

Motul Dot 5.1 is recommended for cars with ABS and is superior to any of the standard dot 3 or 4 fluids.

Motul RBF600 is a high performance DOT4 brake fluid and has a higher dry and wet boiling point than the 5.1. I've read that it goes off sooner than the 5.1 which is untrue as shown by the wet boiling point (or boiling point for 1 year old fluid or fluid with a bit of absorbed water)


Motul Dot 5.1
Dry boiling point 270 °C
Wet boiling point 185 °C

Motul RBF600
Dry boiling point 312 °C
Wet boiling point 216 °C

Has anyone manage to get brake fade with the 5.1 on the track?.

The wet boiling point is rated at a certain percentage of water absorbed, not "after 1 year". The rate of absorption is not the same for different fluids.

[manga_blue]

FWIW I've boiled fresh DOT 4 at Barbagallo. I have not been able to boil DOT5.1 anywhere yet. That's with a pretty stock motor, so I'm not getting the extreme speeds that some of the turbos and serious n/as get.