It is OK to use DOT-4 instead of DOT-3. DOT-4 has a higher boiling point and an excellent corrosion prevention ability compared to DOT-3.

However, if the existing DOT-3 is partially mixed with DOT-4 brake fluid for use, the performance of the DOT-4 brake fluid cannot be fully exhibited,

so it is recommended to inject the DOT-4 product after completely removing the existing product.

DOT-4LV is a high-performance product with a higher boiling point and lower kinematic viscosity at low temperatures compared to DOT-4 products.

The high boiling point of brake fluid prevents the vapor lock phenomenon.

In addition, if the kinematic viscosity is low, more efficient operation is possible in electronic control safety systems (ESP, EPS, ABS, etc.),

delivering a fast and precise braking force by preventing uneven braking.

As a potable moisture analyzer is a device that estimates the moisture content by measuring electrical conductivity,

it is difficult to accurately measure moisture, and there can be a difference in moisture between the moisture measured by a portable moisture analyzer and the actual brake fluid.

As more water can flow into the auxiliary brake fluid tank when it is opened, it is recommended to replace the brake fluid after 2 years or 40,000 km.