AMSOIL 75W-90 100% Synthetic Marine Gear Lube

AMSOIL 75W-90 100% 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 Synthetic Marine Gear Lube delivers advanced outboard protection against power loss and gear wear, even with up to 15 percent water contamination. It promotes long seal life to help prevent water contamination. AMSOIL Synthetic Marine Gear Lube is designed to prevent rust and is compatible with aluminum, copper, and brass alloys.

4.8
star rating from
59
total reviews

This AMSOIL product is available in:

Individual 10 oz. Tube
Quart Easy-Pack
Quart Bottles
Buy Now
Product Code:

AGMQT-EA

AMSOIL 75W-90 100% Synthetic Marine Gear Lube Review by Dave Mann

AMSOIL 75W-90 100% Synthetic Marine Gear Lube Description

AMSOIL 75W-90 100% 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 Synthetic Marine Gear Lube delivers advanced outboard protection against power loss and gear wear, even with up to 15 percent water contamination. It promotes long seal life to help prevent water contamination. AMSOIL Synthetic Marine Gear Lube is designed to prevent rust and is compatible with aluminum, copper, and brass alloys.

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

AMSOIL Synthetic Marine Gear Lube
  • Excellent gear and bearing protection, even when contaminated with 15 percent water
  • Reduced friction and wear
  • Protection against rust and corrosion
  • Long seal life
  • Superior foam prevention

AMSOIL Marine Gear Lube Pressure and Foam Stability Testing Results

Highly Resistant to Water Contamination

Marine gear oils operate in environments subject to water contamination. The chart above demonstrates the ability of AMSOIL Synthetic 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.

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 Synthetic 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 Synthetic Marine Gear Lube.

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

TYPICAL TECHNICAL PROPERTIES

AMSOIL Synthetic Marine Gear Lube 75W-90 (AGM)

Kinematic Viscosity @ 100°C, cSt (ASTM D445) 15.4
Kinematic Viscosity @ 40°C, cSt (ASTM D445) 117.3
Viscosity Index (ASTM D2270) 137
Flash Point, °C (°F) (ASTM D92) 208(406)
Pour Point, °C (°F) (ASTM D97) -43(-45)
Falex Procedure B (ASTM D3233) (failure load, LbF) 2000
Foam Stability (ASTM D892) (20/50/20 maximum) 0/0/0

APPLICATIONS

Use in fresh- and saltwater applications that require 75W-90 or 80W-90 gear lube and any of the specifications listed below, including lower units made by Mercury/Mariner, Johnson/Evinrude, Bombardier, Honda, Yamaha, Suzuki, Force/US Marine, Nissan, Tohatsu and Harbormaster; sterndrives made by Mercruiser-Bravo, OMC/Bombardier, Volvo-Penta, Yanmar, Konrad and Marine Drive Systems; V-drives made by Casale & Menkins; bow thrusters made by Harbormaster Marine; and transmissions made by ZF Marine Transmission.

  • API GL-4, GL-5

COMPATIBILITY

AMSOIL Synthetic Marine Gear Lube is compatible with other commercially available conventional and synthetic marine gearlubes. Follow manufacturers’ recommended service intervals. It is generally a good idea to change gear lube at the end of a season prior to storage.

WARRANTY SECURE

AMSOIL Synthetic Marine Gear Lube is Warranty Secure, keeping your factory warranty intact. Synthetic Marine Gear Lube is a high performance replacement for manufacturer branded products and is also backed by the AMSOIL Limited Warranty. For details, visit AMSOIL.com/warrantysecure.

HEALTH & SAFETY

This product is not expected to cause health concerns when used for the intended application and according to the recommendations in the Safety Data Sheet (SDS). An SDS is available at AMSOIL.com or upon request at (715) 392-7101. Keep Out of Reach of Children. Don’t pollute. Return used oil to collection centers.

AMSOIL 75W-90 100% Synthetic Marine Gear Lube Reviews

5

star rating

Mercury and Yamaha

Put this in my buddies Mercury 115 the last three years and it’s cleaning up what ever was in it when he bought it used. My Yamahas only see Amsoil gear oil and it looks good each year for the change before winter sets in

5

star rating

High hopes

Just did the first 100 hr service on my new Yamaha VF90. Manual called for 90 but this 75w-90 is all that’s offered from Amsoil. Hopefully it’ll be fine.

5

star rating

Lower Units

Using this product in our out boards has been great We have inspected our gears sets and found them in superb condition Just to clarify my out boat is twenty years old and has only eve had this oil in it My boat goes3-5 times per week and more with weather permitting

Read More Reviews

Additional AMSOIL 75W-90 100% Synthetic Marine Gear Lube Resources

Buy Now

SAVE 25% As A Preferred Customer

Sign up today for 25% off all AMSOIL products and enjoy other membership perks and rewards as a preferred customer.