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AMSOIL Synthetic Marine Gear Lube SAE 75W/80W-90 (AGM)
Universal Synthetic Marine Gear Lube
SAE 75W/80W-90 (AGM)

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
  • Works Great in ATV/UTV Differentials
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
PRODUCT DESCRIPTION
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.

APPLICATIONS
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
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.
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)
no water         with 10%  
                         water
1500                 1500
no water         with 10%  
                         water
1100                 
1000
no water         with 10%   
                        water
1000                 1000
Foam Stability
(ASTM D-892)
Sequence I
Sequence II
Sequence III
no water         with 10%
water
0/0                       0/0
0/0                       0/0
0/0                       0/0
no water         with 10%
water
0/0                       0/0
0/0                       0/0
0/0                       0/0
no water         with 10%
water
0/0                 
375/290
0/0                    590/0
0/0                  380/305
Extreme Pressure and Foam Stability Testing
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
Pour Point °C (°F) (ASTM D-97)
-43 (-45)
Flash Point °C (°F) (ASTM D-92)
216 (420.8)
Falex Procedure B (ASTM D-3233) (failure load, lbf.)
1500
Foam Stability (ASTM D-892) (20/50/20 maximum)
0/0/0
TYPICAL TECHNICAL PROPERTIES

AMSOIL Universal Synthetic Marine Gear Lube75W/80W-90 (AGM)
AMSOIL Universal Synthetic Marine gear Lube is compatible with other commercially available
conventional and synthetic marine gear lubes.

Follow manufacturers recommended service intervals.

It is generally a good idea to change gear lube at the end of the season prior to storage.
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