Engol Brake Fluid Dot 4 Is Formulated With High Performance Additives And Inhibitors Which Provide Ultimate Protection Against The Effects Of Corrosion And High Temperature Vapour Lock. Engol Brake Fluid Dot 4 Is Fully Compatible With Other Fluids Meeting Fmvss116dot4 And Fmvss116dot3. However Avoid Mixing With Other Brake Fluid Products To Maintain The Superior Performance Characteristic Of Engol Brake Fluid Dot4.