I went to buy some bottles of Motul RBF 600 and saw the RBF 660 next to it. I contemplated going with the 660 formula but wanted to ask you guys whether or not it was overkill for my purposes. I'll be tracking my car approximately once a month, do you guys think RBF 660 is too extreme?
Will you wheel-to-wheel racers use it?

Motul RBF 660 Specifications:
DOT Rating - 4
Dry Boiling Point - 617

 

It is fine. One of the other brands stuff is incompat, the only potential minus is that it is slightly lower wet than the non-rbf, but meaningless if you track (and flush).

 

RBF 600 is awesome stuff....a little overkill but i rarely had fade on a pretty crappy caliper/pad setup

 

RBF660 has a higher boiling point dry than RBF600, but a lower boiling point wet. This means it absorbs water at a higher rate than RBF600. 660 is pretty much for high performance cars that constantly bleed out the fluid. (race cars) I've spoken to Motul on a couple of occasions regarding this. I use 600 and bleed brakes every 4-6 months. No need for 660.

 

How often would a street-driven car need to flush 600? How does it compare to ATE Blue?

 

I've heard around 6 months to a year for street driving on Motul 600, but that is debatable.

ATE Blue states its fluid is "high performance brake fluids that have both a high dry boiling point (536 deg) and a high wet boiling point (392 deg), but without being excessively hygroscopic. What this really means is that these fluids do not readily absorb moisture like most high performance fluids."

They claim it does not absorb moisture as much as others to excuse the low wet boiling point. Not sure how to confirm this. I've never used ATE. I aways wondered how do you know when ATE is dirty since its dark blue.

 

I'm a big fan of ATE Blue. Been using it now for 5 years without any problems. Even though it is a colored, you can still tell when it gets dirty by the color shade change.

 

The blue goes from dark to darker

 

i used ate super blue.

going to try valvoline synpower at the track...

i figure if i flush twice a year, it would be find and valvoline is CHEAP

 

whats 12oz of the rbf 660 cost?