High Performance lubricant engineered to meet the demands of marine applications. AMSOIL Universal Synthetic Marine Gear Lube provides:
• Excellent Gear and Bearing Protection even when contaminated with 10% water
• Reduced Friction and Wear
• Rust and Corrosion Protection
• Long Seal Life
• Superior Foam Prevention
Package sizes include:
13-oz. Tube
13-oz. Tubes (case of 6)
1-Quart Bottle
1-Quart Bottles (case of 12)
5-Gallon Pail
16-Gallon Keg
30-Gallon Drum
55-Gallon Drum
AMSOIL Universal Synthetic Marine Gear Lube is recommended for fresh and salt water applications requiring either 75W-90 or 80W-90 viscosity grade and meeting either API GL-4 or GL-5 performance standards.
Examples of AMSOIL Universal Synthetic Marine Gear Lube applications include:
Outboard Lower Units:
• Mercury/Mariner
• Johnson/Evinrude
• Bombardier
• Honda
• Yamaha
• Suzuki
• Force/US Marine
• Nissan
• Tohatsu
• Harbormaster Marine Outboard Drives
• Sears Gamefisher and Seagull
Sterndrives:
• Mercruiser-Bravo
• OMC/Bombardier
• Volvo-Penta
• Yanmar
• Konrad
• Marine Drive Systems
V-Drives:
• Casale & Menkens
Bow & Tunnel Thrusters:
• Harbormaster Marine
Marine Transmissions:
• ZF Marine Transmission
AMSOIL Universal Synthetic Marine Gear Lube is an exclusive AMSOIL formulation of synthetic base oils and high performance additives that address the specific concerns of marine applications. It is extreme pressure (EP) additive fortified for superior protection of fast accelerating, high torque/horsepower engines. It protects against shock loading from cavitation of heavily loaded engines.
AMSOIL Universal Synthetic Marine Gear Lube is water resistant. It maintains extreme pressure protection even when contaminated with as much as 10% water. It promotes longer seal life, preventing excessive water leakage. AMSOIL Universal Synthetic Marine Gear Lube protects against rust and is compatible with aluminum, copper and brass alloys.
Marine gear oils operate in environments subject to water contamination. The chart below demonstrates the ability of AMSOIL Universal Synthetic Marine Gear Lube to maintain designed qualities such as extreme pressure/anti-wear performance and resistance to foaming, even when subjected to 10% water contamination.
The Falex Procedure is 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 Universal Synthetic Marine Gear Lube is not affected by water and provides 50% more extreme pressure protection for long gear and bearing life.
The presence of foam in a lubricant disrupts oil film and promotes wear. Water contamination can increase the likelihood of foaming. Industry standard testing demonstrates zero foam in both new and water-contaminated AMSOIL Universal Synthetic Marine Gear Lube. Other conventional gear lubes can foam when mixed with water, as seen in the graph.
Extreme Pressure and Foam Stability Testing | |||||||||||||||
Test | AMSOIL Universal Synthetic Marine Gear Lube (AGM) | Conventional Gear Lube (A) | Conventional Gear Lube (B) | ||||||||||||
| FALEX Extreme Pressure Load Test B (LbF) (ASTM D-3233B) |
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Foam Stability |
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This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Material Safety Data Sheet (MSDS).
Click here to view the MSDS Data Sheet for AMSOIL AGM.
Keep out of the reach of children. Don't pollute. Return used oil to collection centers.
| TYPICAL TECHNICAL PROPERTIES AMSOIL Universal Synthetic Marine Gear Lube75W/80W-90 (AGM) | |
| Kinematic Viscosity @ 100°C, cSt (ASTM D-445) | 14.7 |
| Kinematic Viscosity @ 40°C, cSt (ASTM D-445) | 116.0 |
| Viscosity Index (ASTM D-2270) | 130 |
| Flash Point °C (°F) (ASTM D-92) | 216 (420.8) |
| Pour Point °C (°F) (ASTM D-97) | -43 (-45) |
| Falex Procedure B (ASTM D-3233) (failure load, LbF.) | 1500 |
| Foam Stability (ASTM D-892) (20/50/20 maximum) | 0/0/0 |
Product Name: 75W/80W-90 Marine Gear Lube (AGM)
Current Rating: 4.95out of 5 stars
Votes & Reviews: 10 vote(s) and 9 user reviews.
Reviewed by EJ: 
I have used the marine gear lube for many years its never let me down I highly recomend this product!!!
Reviewed by Joe:
I use this in a 1981 75hpJohnson outboard.
Little to no smoke. Smooth running. Cylinders stay clean and does not foul plugs like other oils. Even Evinrude synthetic. Awesome product.
Reviewed by Mikeapple01:
I've been using Amsoil since the 80's and I'm an ASE certified diesel mechanic with over 30 years of experience. I haven't found any other lubricant that comes close to Amsoil, I recently purchased a boat and drained all the fluids and replaced them with Amsoil marine lubricants. I know I will get years of worry free performance while using Amsoil.
Reviewed by ihboy75:
Good alternative to standard product
Reviewed by James:
This product is used in a 2013 Mercury 4 stroke outboard, 150hp. I change the oil every season with about 75 hours of use.
Reviewed by Larry:
I believe synthetic oils are great for any moving metal parts. No wear, No friction, saves money in years to come and makes my engines very dependable.
Reviewed by Daniel:
Better lube always I used in my Sea Ray Sundancer whit Bravo 3
Reviewed by carb:
easy to use and a great product.
Works great
Works great even up north where I live in 32 degree water