Quicksilver 80W-90 Premium Gear Lube for Marine Engines | Mercury Marine OEM 2.5 Gallon

Premium protection for your marine gear

Clean oil is essential to reduce friction and minimize wear inside your gear housing, helping to extend engine life. Quicksilver 80W-90 Premium Gear Lube is engineered for outboard applications below 75hp and has been extensively tested to deliver robust protection against corrosion and wear. This formulation is purpose-built to help prevent failures due to water entering the gear housing, a common challenge in wet marine environments.

Specific design includes improved emulsifiers that actively help manage water intrusion, keeping the gear system better protected when water makes contact with internal components. The 80W-90 viscosity provides a strong lubricating film across a range of operating temperatures, supporting smooth gear engagement and quieter operation under typical boating conditions.

The Quicksilver brand has delivered uncompromising engine oils, parts, and accessories to the marine industry for more than six decades. As a premier supplier of Mercury Marine original equipment replacement engine parts, oils, and accessories, Quicksilver products are backed by extensive testing and a deep understanding of demanding marine environments. When you choose Quicksilver, you’re aligning with a legacy of performance, protection, and peace of mind for original equipment reliability.

Key benefits at a glance

• Direct replacement for Mercury Marine 858059K01
• Formulated to protect against corrosion and excessive wear
• Improved emulsifiers protect gears should water enter the gear housing
• 80W-90 viscosity for a strong lubricating film across operating temperatures
• Designed for outboard applications below 75hp
• Produced to meet Mercury Marine OEM specifications for original equipment protection
• Brand legacy: Quicksilver brings 65+ years of marine lubrication expertise

Real-world use and scenarios

• Ideal for seasonal maintenance and after-gear service to preserve gear trains
• Suitable for both saltwater and freshwater boats, helping protect metallic surfaces and bearings
• Compatible with Mercury Marine installations and other OEM-recommended gear lubrication needs
• A premium option for reliable starts and smooth operation during weekend outings

Note: This product is designed to deliver consistent lubrication performance within its stated use case and is not a guarantee of specific results in every scenario. Consider your engine specifications and maintenance schedule when planning replacements.