Quote:
Originally Posted by soundman98
well brake fluid is hydroscopic, meaning it pulls water from the environment.
as far as what percentage is good/bad, i really don't know...
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0% = Ideal
1-2% = OK, pretty typical for old fluid in the first year or two.
~3% = Time to change, preferably soon.
4%+ = Change it now. You're risking brake performance from overheating/boiling the fluid and from corrosion within the calipers/lines.