Protects power steering systems against wear and breakdown. Vital parts in today?s power steering systems need protection in order to keep them operating over a wide range of summer and winter temperature conditions. Specifically designed for power steering units, STP Power Steering Fluid provides year-round protection. BENEFITS : Protects Against Wear and Pump Breakdown Caused by Abnormal Wear, Oxidation, and Foaming. Performs Even in Sub-Zero Temperatures. Specifically Designed for Power Steering Units USAGE FREQUENCY: As needed.