Hobgoblin Posted November 19, 2012 Share Posted November 19, 2012 Hi all. Think I cooked my brake fluid at Oulton Park last week, in the Mister Two. Can anyone recommend the best fluid for track only use? Cheers Quote Link to comment Share on other sites More sharing options...
Chris Bailey Posted November 19, 2012 Share Posted November 19, 2012 Dot 4 FTW! Quote Link to comment Share on other sites More sharing options...
Dnk Posted November 19, 2012 Share Posted November 19, 2012 Dot 4 FTW! Best fluid for track use ? lol Quote Link to comment Share on other sites More sharing options...
Chris Bailey Posted November 19, 2012 Share Posted November 19, 2012 Best fluid for track use ? lol I dont know! I only use DOT 4 at work Quote Link to comment Share on other sites More sharing options...
Dnk Posted November 19, 2012 Share Posted November 19, 2012 (edited) I dont know! I only use DOT 4 at work Castrol SRF for the win with a 320 C dry boiling point and 270 C wet boiling point, but its very expensive at £50 a litre You could use a special DOT 4 that has a higher dry and wet boiling point than normal DOT4 Normal DOT 4 (265 C dry and 160 C wet) Special DOT 4 (312 C dry and 216 C wet) Motul RBF600 Factory line is a higher spec DOT4, i use this in my car. There is also Motul RBF660 which has 325 C dry and 204 C wet boiling point and is approx the same cost as Castrol SRF Edited November 20, 2012 by Dnk (see edit history) Quote Link to comment Share on other sites More sharing options...
Hobgoblin Posted November 20, 2012 Author Share Posted November 20, 2012 Cheers guys Quote Link to comment Share on other sites More sharing options...
Dnk Posted November 20, 2012 Share Posted November 20, 2012 When was your brake fluid last changed ? Its hydroscopic so absorbs moisture which massively lowers its boiling point. I'd do a full vacuum flush and give the RBF 600 a try as its half the price of the SRF, i didn't have any issues with this at Silverstone on my last track day but it was fresh fluid. Quote Link to comment Share on other sites More sharing options...
scott87 Posted November 20, 2012 Share Posted November 20, 2012 Could you not just use dot 5.1? Isnt the point of that being higher boiling points etc? Quote Link to comment Share on other sites More sharing options...
Dnk Posted November 20, 2012 Share Posted November 20, 2012 Could you not just use dot 5.1? Isnt the point of that being higher boiling points etc? 270 C dry and 185 C wet Quote Link to comment Share on other sites More sharing options...
scott87 Posted November 20, 2012 Share Posted November 20, 2012 270 C dry and 185 C wet Not as high as i thought then. (On a separate note, i assume Dot 4 is fine for Supra daily road use then...) Quote Link to comment Share on other sites More sharing options...
Dnk Posted November 20, 2012 Share Posted November 20, 2012 (edited) Not as high as i thought then. (On a separate note, i assume Dot 4 is fine for Supra daily road use then...) Yes the basic DOT 4 is fine. The higher spec SRF & RBF600 have a downside and need replacing sooner than normal DOT 4. Edited November 20, 2012 by Dnk (see edit history) Quote Link to comment Share on other sites More sharing options...
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