Pro Honda HP4S motorcycle oil delivers the ultimate in performance, protection and durability. Formulated for those who refuse to compromise on quality, in the tradition of excellence by Honda Research & Development. Hi-Performance full synthetic oil is engineered specially for severe duty and racing applications. Exclusive formulation gives maximum engine wear protection during the critical cold start period, and during high rpm use. Shear-stable polymer additive for smoother, more positive shifting. Reduced friction for maximum power, better fuel economy, cooler running and minimal engine wear. Lower volatility for reduced oil consumption. Dyno tested to provide maximum horsepower. Better low temperature fluidity for easier cold weather starting. Superior corrosion resistance than conventional motor oils.