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Is DOT4 Brake Fluid Universal?

1 Answers

KingAnn

07/29/25 9:53pm

Qualified and up-to-standard brake fluids of the same quality grade can be mixed. For example, DOT4 brake fluids from major brands can be mixed. However, if using a low-quality brake fluid like DOT3 and switching to a high-quality DOT4 brake fluid, the original brake fluid must be completely drained. Brake fluids of different quality grades should not be mixed. Automotive brake fluid has the following characteristics: Characteristic one: Automotive brake fluid has a very low freezing point, ensuring good fluidity under low-temperature conditions. Characteristic two: Automotive brake fluid has an extremely high boiling point, preventing vapor lock under high-temperature conditions.

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