Performance Machine Supreme DOT 4 Brake Fluid is designed for use in high-performance braking conditions associated with PM brake systems. This synthetic brake fluid exceeds DOT 4 specifications and meets European DOT 5.1 specifications. Perfect for use in ABS and Non-ABS systems, PM’s glycol-ether fluid performs to the same levels as DOT 5 silicone fluids, without the air absorbing issues common with silicone DOT 5 brake fluids.