Equip your semi to be Ready for the Road Ahead , with the Motor Medic Dot 3 Heavy Duty Brake Fluid, a crucial element that aids in the transfer of force throughout the hydraulic brake system. Due to its specialized formula, this reserve of replacement liquid is able to flush throughout the brake system to generate hydraulic pressure and lubricate various components. Mixed with a premium blend to reduce leaks and how often the brake fluid needs to be changed. FleetPride is your First Click in Heavy Duty .