Quote:
Originally Posted by donk.
Curious why you are doing annual brake flushes? Does tracking laps cause that much wear on the mineral oils or such?
I mean all the cars I have had, I don't think I have EVER flushed the brakes, including auto-x days. Only time was when my prelude had some odd brake issues, and a truck that had sponge brakes = needed a flush.
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If you're doing track work, especially wiih RBF/SRF/high temp fluid, you want annual flushes. The high temp brake fluid absorbs moisture faster, and thus can degrade faster than the regular brake fluid. Also, car brake fluid isn't mineral oil - that's Shimano bicycle brakes my dude lol. Most manufacturers advise to do brake flush every 2-3 years, as it's time based and not really KM-based.
EDIT: DOT vehicle brake fluids are glycol-based, and hygroscopic (absorbs moisture). When that happens, it's easier to "boil" your brakes and lose braking power as air/gases form in the line to cause bubbles.
Besides, the brakes are the most important part of the car on track, and a $120 flush (or less, DIY) is cheap insurance to make sure that your stopping power is unaffected.
https://www.motortrend.com/how-to/12...g-brake-fluid/
https://nasaspeed.news/tech/brakes/h...rake%20system.