Use HPF PRO™ gearcase lubricant for high performance outboards, commercial fleets, rental operations and stern drives. A high-Viscosity blend of enhanced friction reducers, anti-foam agents, and synthetic E-P additives systematically deliver exceptional durability and reliability with ultimate film strength. Marine-specific inhibitors and emulsifiers deliver unequalled protection against corrosion and lubricant breakdown caused by water intrusion. HPF PRO™ promotes long gearcase life in marine use, especially in severe duty applications.