Synthetic Marine Gear Lube

High-Performance Lubricant Engineered to Meet the Demands of Marine Applications

AMSOIL Synthetic Marine Gear Lube is an exclusive AMSOIL formulation of synthetic base oils and high-performance additives that addresses the specific concerns of marine applications. It is fortified with extreme-pressure (EP) additives for superior protection of fast-accelerating, high-torque/horsepower engines. It protects against shock loading from cavitation of heavily loaded engines.

AMSOIL Marine Gear Lube delivers advanced outboard protection against power loss and gear wear, even with up to 15 percent water contamination.1 It promotes long seal life to help prevent water contamination. The AMSOIL Marine Gear Lube is designed to prevent rust and is compatible with aluminum, copper and brass alloys.

Synthetic Marine Gear Lube
Synthetic Marine Gear Lube 75W 90 Quart AGMQT scaled
AMSOIL Synthetic Marine Gear Lube 75W-90

• Excellent gear and bearing protection, even when contaminated with 15% water1
• Reduced friction and wear
• Protection against rust and corrosion
• Long seal life
• Superior foam prevention

1Based upon AMSOIL testing of AMSOIL 75W-90 Synthetic Marine Gear Lube in ASTM 3233 and ASTM D892.


Marine gear oils operate in environments subject to water contamination. The chart above demonstrates the ability of AMSOIL Marine Gear Lube to maintain designed qualities such as extreme-pressure/anti-wear performance and resistance to foaming, even when subjected to 15 percent water contamination.1

The Falex Procedure is a measurement of a gear lube’s extreme-pressure and anti-wear properties. A high value in the Falex Extreme-Pressure Test relates to extra extreme-pressure protection. AMSOIL Marine Gear Lube provides extreme-pressure protection and is highly resistant to the effects of water contamination.

The presence of foam in a lubricant disrupts the oil film and promotes wear. Water contamination can increase the likelihood of foam. Industry-standard testing demonstrates zero foam in both new and water-contaminated AMSOIL Marine Gear Lube.

*All trademarked names and images are the property of their respective owners and may be registered marks in some countries.
1No affiliation or endorsement claim, express or implied, is made by their use.
1Based upon AMSOIL testing of AMSOIL Synthetic Marine Gear Lube 75W-90 in ASTM 3233 and ASTM D892.

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