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Originally Posted by xb-60
So....why is it no longer recommended? (I have to say, I've never used it myself)
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I tried to find a performance brake manufacturer that recommends DOT 5 and couldn't - but there's bound to be somebody out there that does, I just couldn't find one. Most of them say about the same thing that RDA does below (they were the last ones I checked).
Quote:
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DOT 5 - Silicone based and must have a minimum boiling point of 265 degrees Celsius dry and 180 degrees wet. Being silicone based this type of fluid flows more easily through the pressurized braking system Giving greater braking performance and thereby reducing heat build up. The disadvantage is that by it’s nature being more compressible it allows more room for air to be present within the fluid (air becomes trapped within its molecular structure).
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Source:
RDA Brakes, The Big Brakes Company. | Brake Fluid Information