Got this in an email this morning ..... Red Line now offers its own high performance brake fluid perfect for street or track use. RL-600 (PN 90402) High Performance Brake Fluid is engineered to maintain viscosity, lubricity, and compressibility at extreme temperatures to help safeguard against brake fading and vapor lock in racing, performance and street applications. RL-600 blends with and meets specifications of DOT 3, DOT 4 and DOT 5.1.