Description: General Pump Series 100 is premium, non-detergent industrial pump oil designed to enhance the performance and increase the lifespan of pressure washing equipment. The lubricant is available in a 16 ounce bottle and features a high viscosity formula for smooth, continuous operation under a wide range of temperature conditions. We recommend that General Pump Series 100 be used for crankcases on hot or cold water pressure washer systems that require 25 BHP or less. Usage Directions: Oil must be changed after an initial 50-hour break-in period, then every 3 months after that to the next 500-hour interval.