Terry Adams

Last weekend I did about 80 miles of spirited driving up and down some back country mountain roads. After a section with a lot of braking, I noticed my pedal going mushy and needing a pump or two so it would bite at the top and not half way down. Ambient temp about 85º. 11.5K miles on the car.

After a 20 minute break, the pressure came back completely and was fine for the last 500 miles to drive home.

1. What happened?

2. Should I get my brake fluid changed immediately or at the next oil change in 500 miles?

ltc

I would have the system flushed/bled and refilled with something a bit better than OEM fluid (at least with regards to wet boiling point).

99x Turbos are big, fast (some would say fat) and heavy, which tends to bring out minor deficiencies in brake systems; track or spirited road driving.

ATE Typ 200 (aka ATE Gold....same as ATE Blue, just no dye) is popular and inexpensive.
Motul RBF600 is very good as well.

FWIW, I only use Castrol SRF. I don't care if it's $70/can. IMHO, there is nothing better; you never have to worry about your brake fluid ever again.

Brake fluids have been extensively discussed in the Racing/DE forum, a search will yield lots of good results.

Terry Adams

Thanks ltc. Will do. Not concerned about cost if it keeps a nice car from going off road.

TT Surgeon

I use the super blue once a yr. Yes, your fluid boiled. My old c4s did it one time at limerock so bad that it melted the brake sensors!

TT Gasman

GS 610 is the real deal.

David A

Motul is great and not expansive. Make sure you don't have air in the lines.

Land Jet

Terry, go with SRF and forget about brake problems. Plus it is more resistant to water absorbtion. No need to bleed your brakes between fluid changes either. I've done a couple of DE's with mine and no problems and I'm sure I was braking harder than you on mountain roads.