2026 Supra Brake Fluid Recommendations - For Track & Daily Use

[tree]

Hey y'all,

Bit new to this forum but I've been lurking around for a while... I'll preface this by: this is probably an uneducated/dumb question...

I have a stock 26 Supra that I got this year and was wondering if anyone had recommendations (or if there even is a need!) for better brake fluid? I believe the stock car comes up with Pentosin DOT4 fluid but I've read some people saying that the brakes get quite squishy by the end of track days.

Some older forums discussed upgrading to DOT 5.1, but I never found much conclusive information (I might be bad at reading...). I've been taking my car to HDPE/track nights but I also tend to daily it, which I know might affect my choice here.

Curious on what people are running these days and if this even is a valid question/matters.

Thanks!

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[Traxion]

Castrol SRF and bleed once per year. Some people say Endless for pedal feel but SRF should have longer life and better for daily use.

 

[johnsmither]

SRF, same interval as the person above.

 

[chrisriker]

SRF is what I run. I ran RBF600 last season and the pedal feel was atrocious compared to SRF

 

[Razors Edge]

Here you go…

https://www.fcpeuro.com/products/sl6-brake-fluid-1-liter-ate-sl6

 

[Hasan]

I have always run SRF. Never had any issues. Never tried anything else.

 

[tree]

Thanks y'all! Glad to hear the tried and true still works. Castrol SRF it is!

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