Re: D.O.T. 3-4 vs. D.O.T. 5 for a '56 Patrician
Posted by Owen_Dyneto On 2015/9/16 10:20:19
My only real concern with DOT 5 is that some folks make the assumption that once they change over it's good forever. Moisture enters the brake system by the same mechanisim (via humidity-laden air drawn in thru the vent each the brakes are applied) as with any other brake fluid. Since the moisture isn't absorbed and dispersed thru the fluid as it is with conventional fluids, it tends to collect in the lowest point in the system where it can do damage. So regardless of which brake fluid type you use, changing it every few (3-6?) years is very good preventative maintenance.
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