Sierra 18-9650-2 Hi-Performance Gear Lube - 1 Quart Synthetic blended marine formulation reduces operating friction for increased performance Protects gears, bearings and other gear case components For use in high performance and high load operating conditions in both outboard and I/O lower units Designed to surpass the performance of the O.E. Hi-Performance gear lubricants Replaces: Mercury (Quicksilver) Hi-Performance Blend, OMC (System Matched) Ultra-HPF Blend and Yamaha (Yamalube) LUB-GEARL-11-00