What are you guys running for fluid? SRF / Motul. The SRF is silicon I think - is this bad for the seals?

 

Castrol SRF

 

Couldn't agree more.

 

The SRF cannot be mixed with any other fluid if an emergency pops up. Which makes me always suggest the Motul 600. That being said, both are great alternatives.

 

SRF CAN be mixed....

Just read the can.......

 

I personally spoke with a Castrol rep about this 2 years ago and he advised heavily against mixing the fluid as it can gel up. Maybe they have changed their forumla?

 

Heard the same thing and that's why I don't use it.

 

I just ordered a couple bottles of SRF .. 1 liter for flushing .. one for top up.

 

remember SRF has to be changed 18 months after install!!! i would sugest every 12 months.... i use it in cup car and street GT3... never a problem and never blead brakes while using it

 

Thanks for the input. I have always run ATE Blue - but noticed that I still needed to bleed fairly frequently. I'm curious about the Motul 600 - is this a step up from the ATE Blue?

 

Definitely. Personally I don't think the added cost of the SRF over the Motul is justified by the performance. Most drivers even on tracks that are tough on brakes will not see any difference. Just my opinion.

Gary

 

Gary, a bottle is what, 80 bucks and you drive a $250,000 car?

SRF is the best stuff out there, its wet boiling point is superior to all others, and for non racers, this is exactly the most critical parameter. Dry boiling points are important for those that completely flush their brakes before every track event. I certainly don't do that.

More info

http://www.swedishbricks.net/700900F...Comparison.htm

An extra 50 degrees of protection is not trivial.

And, the worse the driver, typically the tougher he is on brakes. And, if you are running PCCBs, they tend to run pretty hot; added protection is defiintely a plus.

For the ultimate setup, fresh Castrol SRF with a complete flush done the old fashion way: two person bleed. This technique provides a better, stiffer pedal than any of the pressure bleeders or vaccum bleeders. And the speedbleeder type devices can be a nightmare; I'd skip those.

 

Any benefit to using this stuff on non-track cars (PCCB) or is it overkill?

 

Really, really doubtful. You cannot detect a difference in brake feel from one fluid to the next (ignoring silicones which are compressive) until you get a lot of heat into your brakes, heat from track use or from slowing down on the Autobahn from 180 mph to 30 mph. In other words, it's almost impossible to really heat load your brakes on the street.

I wouldn't mess with the factory fill unless you go to the track.

 

I probably shouldn't have mentioned price, I will just emphasize I have never had any fade with Motul. And I paid $177k.

Gary