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Brake Fluid Identification ?

Started by Racer57, April 07, 2021, 07:24:37 PM

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Racer57



Is there a way to identify what kind of brake fluid you already have in the car ?

Chryco Psycho

Yes if you take a small amount & add water , DOT 3 & 4 will mix , alcohol based , DOT 5 is silicon based & will not mix  .
I always use DOT 5 in cars I rebuild as it will not affect paint , use DOT 4 over DOT 3 if you are using either as DOT 4 has a higher boiling point .

Racer57

Quote from: Chryco Psycho on April 07, 2021, 08:03:59 PM
Yes if you take a small amount & add water , DOT 3 & 4 will mix , alcohol based , DOT 5 is silicon based & will not mix  .
I always use DOT 5 in cars I rebuild as it will not affect paint , use DOT 4 over DOT 3 if you are using either as DOT 4 has a higher boiling point .

Thank you !!   Thats one of those common sense answers that makes a person think "Why didn't I think of that !! "    :D