Sierra Full Synthetic Lower Unit Gear Lube - Qt.Specifically formulated to optimize gear life by reducing friction and providing superior wear protection in severe operating conditions. The unique synthetic formulation is shear stable and resists oxidation to ensure high performance over a wide range of ambient operating temperatures.Sierra Synthetic Lower Unit Gear Lube FAQHow much gear lube does my engine need?It varies model to model, check out our Gear Lube Capacity Guide for more information and capacity charts!// Features: API GL-5/MIL-L-210E; Color: Gold; Weight: 75W-90; Size: Quart; Replaces: Mallory; 9-82801; Volvo Penta; 1141679; Sierra 18-9680-2.1 Synthetic Lower Unit Gear Lube Manufacturers Safety Data Sheet