Quicksilver High Performance Gear Lube Marine Accessory - 8oz The Quicksilver High Performance Gearcase Lube Marine Accessory outperforms automotive gear oil in marine applications because of its specialized additive package design. For use in all lower units on outboards and all stern drives. This lubricant is the most recommended OEM marine gear lube. Continued use of this gear case lubricant will: Provide maximum protections against excessive wear - even in water Prevent corrosion and pitting Extend the life of the gear The Quicksilver High Performance Gear Lube Marine Accessory is recommended for use in marine gear cases with marine engines above 75 HP. SAE 90