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What does dot mean in brake fluid?

Updated: 10/25/2022
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11y ago

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Most brake fluid sold in North America is classified by the U.S. Department of Transportation (DOT), with ratings such as "DOT 3", "DOT 4" and "DOT 5.1". Each designation denotes a particular mixture of chemicals imparting specified ranges of boiling point. As of 2006, most cars produced in the U.S. use DOT 4 brake fluid.


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Q: What does dot mean in brake fluid?
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