Top 9 Mercury Lower Unit Oil – Gear Oils

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1. Quicksilver


Quicksilver 858064Q01 High Performance SAE 90 Gear Lube for Mercury Outboards and MerCruiser Sterndrives, 32 oz

Quicksilver #ad - 32 ounce bottle. Designed for outboard and sterndrive applications above 75 HP. Extreme pressure synthetic additives protect gears from metal to metal contact. Formulated to protect against corrosion and excessive wear. Sae 90 viscosity.
BrandQuicksilver #ad
ManufacturerQuicksilver #ad
Height9.87 Inches
Length7.62 Inches
Weight1.01 Pounds
Width8.75 Inches
Part Number92-858064Q01

2. Hardware & Outdoor


Mercury SAE 90 High Performance Gear Lube

Hardware & Outdoor #ad - Genuine oem factory original Equipment Mercruiser Sterndrive & Outdrive Oil. Engineered to provide maximum protection for sterndrive and outboard lower units. For use in most gear housings of Mercruiser sterndrives and all Mercury, Mariner, and Force Outboards. Extreme pressure synthetic additives protect gears from metal to metal contact. Exclusive formula is engineered to provide extended gear life in extreme conditions including high-speed and high-horsepower applications.
BrandHardware & Outdoor #ad
ManufacturerHardware & Outdoor #ad
Height9.5 Inches
Length4.25 Inches
Width2.25 Inches
Part Number92-858064K01

3. Slippery Pete


Slippery Pete, Lower Unit Gear Oil Pump for Standard Quart Bottles, Includes 3/8" Metal Swivel, 8mm and 10mm Adapters to Fit Most Major Marine Boat Outboard Motors

Slippery Pete #ad - This gear oil change kit includes 3 adapter sizes. 2 rigid suction tubes reaches to bottom of tall and short gear OIL BOTTLES!! Easy to follow instructions On Back Of Header Card. 3/8"swivel, metal, 8mm and 10mm Metal. Take the guess work out of figuring out the size of your motor's gear oil drain plug. Pumps 8cc per pump stroke includes metal 3/8" adapter Connected To Clear Plastic Tubing. 100% money back guarantee, 100% packaged and inspected in the usa.
BrandSlippery Pete #ad
ManufacturerSlippery Pete #ad
Height1 Inches
Length9 Inches
Width6 Inches
Part Number573164
Warranty90 days from date of purchase

4. QuickSilver


858058Q01 Premium Gear Lube 80W-90

QuickSilver #ad - Improved emulsifiers protect gears should water enter the gear housing. Designed for outboard applications below 75 HP. Special additives protect gears from metal to metal contact. Exclusive formulation helps improve film adhesion to gears. 25w-40 viscosity. Formulated to protect against corrosion and excessive wear.
BrandQuickSilver #ad
ManufacturerQuicksilver #ad
Height9.25 Inches
Length4 Inches
Weight1.8 Pounds
Width2.38 Inches
Part Number858058Q01

5. Harvard Marine



Harvard Marine #ad - Mercury quicksilver High Performance Gear Lube 32oz. See description for Fitting. Gear lube Pump. Fits 3/8-16 drain Screws.
BrandHarvard Marine #ad
ManufacturerQUICKSILVER #ad
Weight2 Pounds
Part Number802891Q05



Mercury 92-858064K01 Marine SAE 90 High Performance Gear Lube, 1 Quart

MERCURY #ad - For use in all outboard lower units, jet pumps, and Sport JETS and all Mercury mercruiser sterndrives. Meets api gl-4. Water intrusion - advanced emulsifiers prevent foaming to protect gears if water enters gear housing. Wear - tackifiers and extreme pressure additives improve oil film adhesion and protect against Excessive wear.
BrandMERCURY #ad
ManufacturerNorthern Wholesale Supply, Inc (Boating) #ad
Height9 Inches
Length9 Inches
Weight1 Pounds
Width8 Inches
Part Number92-858064K01

7. Lucas Oil


Lucas Oil 10652 Marine Gear Oil, 32 oz. packaging may vary

Lucas Oil #ad - Resists extreme pressure and reduces extreme friction. Long lasting with effective water resistance. Fortified with anti-foaming agents to prevent cavitation at high RPM's. Provides rust and corrosion protection in both fresh water and salt water environments and during long periods of storage. Safely blends with all other known gear oils and additives.
BrandLucas Oil #ad
ManufacturerLucas Oil #ad
Height11.6 Inches
Length3.3 Inches
Weight2 Pounds
Width3.3 Inches
Part Number10652



Star brite Lower Unit Gear Lube

STAR BRITE #ad - These products exceed all engine manufacturers-Feet specifications and are designed specifically for the marine environment. Formulated with special anti-wear additives, rust and corrosion inhibitors. Recommended for use in mercury, evinrude, mariner, nissan, suzuki, OMC, mercruiser, Force, Johnson, Yamaha and Volvo Will not void manufacturers-Feet warranties For lower units of all outboard motors and stern drives. The ultimate lubrication for maximum performance and economy.
ManufacturerStar brite #ad
Height9 Inches
Length2.25 Inches
Weight2.01 Pounds
Width4.25 Inches
Part Number027132

9. Sierra


Sierra 18-9650-5 Hi-Performance Gear Lube, 5 Gallons

Sierra #ad - Gl-5 rated Lube. 5 gallon container. Designed to surpass the performance of the O. E. 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. Hi-performance gear lubricants.
BrandSierra #ad
Manufacturer3M - AAD #ad
Height12.01 Inches
Length15.75 Inches
Weight38.2 Pounds
Width12.01 Inches
Part Number18-9650-5
WarrantyLimited Warranty