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Can you use dot 3 brake fluid when it calls for 4?

It is not recommended to use DOT 3 brake fluid when it calls for DOT 4. DOT 4 is a higher-quality brake fluid than DOT 3 and provides better performance. Here are a few reasons why you should not use DOT 3 in place of DOT 4:

* DOT 4 brake fluid has a higher boiling point than DOT 3. This means that it can better withstand the heat generated by braking, and will not vaporize as easily. This can help to prevent brake failure and improve safety.

* DOT 4 brake fluid has a lower viscosity than DOT 3. This makes it flow more easily through the brake lines and improve braking performance.

* DOT 4 brake fluid is also more resistant to corrosion than DOT 3. This can help to extend the life of the brake components.

If your vehicle calls for DOT 4 brake fluid, it is important to use the correct fluid. Using DOT 3 brake fluid instead of DOT 4 could compromise the performance of your brakes and could even lead to brake failure.

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