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If you remove boiling point as a need/factor, is there any performance or other differences between fluids? There's DOT 4 fluids out there that run the gamut of temperatures, so I was just curious if one outweighs the other for a DD if boiling isn't a factor. This is making the safe assumption that the average person will never come close to boiling brake fluid on a daily driver even with some spirited mountain roads.
 

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DOT4 has higher dry boiling points, but is more prone to moisture.

DOT3 has lower dry boiling points, but is less prone to moisture.

DOT5 will **** your **** right up. DO NOT USE DOT5.

Other than that, and discounting boiling temps, there's zero difference between DOT3 and DOT4, past a few bucks at the register.
 
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