Thread: DOT 3 vs. DOT 4 brake fluid:
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Join Date: Jul 2001
Location: los angeles, CA.
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DOT 3 vs. DOT 4 brake fluid:
I’ve been meaning to ask this for a while, why do they even make DOT 3 and why do so many vehicles specify it? It’s basically the same as DOT 4 but with a lower boiling point, correct? I always use DOT 4 where 3 is specified, am I doing it wrong?

Thanks as always.
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Denis
Old 07-10-2025, 03:07 PM
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