I suppose the assumption made is that DOT 5.1 simply must meet DOT 5 performance standards with a non-silicone base.īTW - wasn't there some blue Pentosin DOT 4 brake fluid? I recall hearing that some would use that an alternate the blue with the amber version to determine when the previous fluid had been completely flushed out. It's also convoluted with its lack of mention of DOT 5.1 other than it's a "non-silicone base" and has to be colorless to amber, while silicone must be colored purple. When brake fluid, except DOT 5 SBBF, is tested according to S6.4, the pH value shall not be less than 7.0 nor more than 11.5. (212 Â☏.) nor more than the following maximum value for the grade indicated: Prestone DOT 3 provides corrosion protection for ALL metals within the braking system and is suitable for disk, drum, and ABS brakes. When brake fluid is tested according to S6.3, the kinematic viscosities in square millimeters per second at stated temperatures shall be neither less than 1.5 mm2/s at 100 Â☌. Prestone DOT 3 Synthetic Hi-Temp Brake Fluid lasts longer and provides a higher margin of safety because of its high temperature synthetic formula. Is tested according to S6.2, the wet ERBP shall not be less than the following value for the grade indicated: When brake fluid is tested according to S6.1, the ERBP shall not be less than the following value for the grade indicated: S5.1.1 Equilibrium reflux boiling point (ERBP). When tested in accordance with S6, brake fluids shall meet the following requirements:
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