Can DOT3 and DOT4 Brake Fluids Be Mixed?

[VonCharlotte]

Brake fluids DOT3 and DOT4 can be mixed. However, mixing brake fluids will cause a decrease in the performance indicators of the brake fluid. Different brands and types of brake fluids have different formulations, and even if they are relatively compatible or labeled as mixable or substitutable, they should not be mixed for long-term use. Below is some extended information about brake fluid: 1. Brake fluid is a liquid medium that transmits braking pressure in hydraulic braking systems and is used in vehicles equipped with hydraulic braking systems. 2. Brake fluid, also known as brake oil or force oil, is called Brake-Fluid in English. It is an indispensable part of the braking system. In the braking system, as a medium for force transmission, the liquid cannot be compressed, and the pressure output by the master cylinder is directly transmitted to the wheel cylinders through the brake fluid. 3. Alcohol-based brake fluids are used, but their disadvantage is a relatively low boiling point, which can easily lead to vapor lock during high-temperature driving, and they have poor low-temperature performance.