Like DOT 3 and DOT 4 fluids, DOT 5.1 has a glycol ether base. That makes DOT 5.1 brake fluid compatible with DOT 3 and DOT 4 fluids, but it follows the same rule outlined above — DOT 5.1 fluid ...

There are several types of brake fluid available on the market, including DOT 3 ... compatible with your vehicle’s braking system. Some brake fluids are not compatible with certain types of ...