Sierra - Hi-Performance Gear Lube - Synthetic Blend - 5 Gallon - 96505. Designed to surpass the performance of the O.E. Hi-Performance gear lubricants. For use in high performance and high load operating conditions in both outboard and I/O lower units. GL-5 Rated. Protects gears, bearings and other gear case components. Replaces BRP (System Matched) Ultra-HPF Blend, Mercury (QuickSilver) Hi-Performance Blend, and Yamaha (Yamalube) LUB-GEARL-11-00. Synthetic blended marine formulation reduces operating friction for increased performance. Replaces: Mercury 92-858064Q01.. Features:. Size - 5 Gallons. Sythetic Blend