I'm moving my J65 setup to have the 13" pro series brakes from Spohn on the front. Whats recomended for brake fluid with these brakes? I'm looking for something that can cope with track days where I'll have to brake from 120mph down about 35mph every 30seconds for 30minute sessions. I'm thinking about using DOT5.1 non-mineral fluid rated to 551degrees Farenheit, or the same rated to 600F. Any thoughts? Is DOT 5.1 fluid suitable or should it be DOT 4? Cheers, Si.

I'll post this up again. Castrol SRF is the best your can get. But they charge like it is. the ATE Superblue would be my choice for racing, unless you can cope with paying the price for castrol.

Dry Boiling Point Wet Boiling Point Viscosity @ -40°C Viscosity @ 100°C
DOT 2 374°F N/A
DOT 3 401°F 284°F
DOT 4 446°F 311°F 1800 max 1.5 min
DOT 5 (silicone) 500°F 356°F
DOT 5.1 (non - silicone) 500°F 356°F
Castrol LMA DOT 3/4 446°F 311°F N/A N/A
Ford Heavy Duty DOT 3 550°F 290°F N/A N/A
ATE Super Blue Racing 536°F 392°F N/A N/A
ATE TYP 200 536°F 392°F N/A N/A
Motul Racing RBF 600 593°F 420°F N/A N/A
Motul DOT 5.1 N/A 365°F N/A N/A
Motul DOT 4 473°F 316°F N/A N/A
Motul DOT 3 462°F N/A N/A N/A
Prospeed GS610 610°F 421°F 1525 2.5
Castrol SRF 590°F 518°F N/A N/A
Performance Friction 550°F 284°F N/A N/A
AP551 527°F 302°F N/A N/A
AP600
(not DOT approved and not compatible with any other fluids)
572°F 410°F N/A N/A
Ferodo DOT 4 446°F 311°F N/A N/A
Ferodo DOT 5.1 500°F 356°F N/A N/A
Wilwood 570 570°F N/A N/A N/A