Quote:
Originally Posted by Rey
There is a school of thought that says brake fluid circulates slowly throughout the brake system - that explains how the fluid in your reservoir becomes dirty. If it didn't circulate it would remain clear. This school says just change out the reservoir from time-to-time.
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I'll agree with you that it does slowly circulate, afterall, when you press on the pedal, the fluid from the reservoir is being pushed into the lines. Release and it flows back.
But for any hard driving, I'd prefer the more thorough brake line flush. I'd also recommend a full flush ESPECIALLY if you track your car.