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In the March 2003 issue of Lubes 'n' Greases, Automotive Editor David McFall wrote an in-depth article on the subject of extended oil drain intervals and touted AMSOIL as a safe, cost-effective and environmentally preferred choice. He praised AMSOIL for their commitment to excellence and labeled AMSOIL "unshackled" for never conforming to industry norms and standards.

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AMSOIL 10W-30 Motor Oil and ten competing oils were subjected to a series of tests. AMSOIL  outperformed all the competitors in nearly every test! See the impressive test results!

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AMSOIL Universal Synthetic
75W/80W-90 Marine Gear Lube

AMSOIL 75W/80W-90 Synthetic Marine Gear Lube

Universal Formulation
Meets Specs for 13 Manufacturers!

AMSOIL Universal Synthetic 75W/80W-90 Marine Gear Lube has been improved and reformulated to meet even broader specifications. The new AMSOIL Universal Marine Gear Lube meets the requirements of 13 manufacturers, making it more convenient and versatile than the former version (AMSOIL Marine Lower Unit Gear Lube). AMSOIL Universal Marine Gear Lube is an exclusive formulation of AMSOIL synthetic base oils and high performance additives engineered for the specific demands of marine applications.

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  • Excellent gear and bearing protection, even when contaminated with 10% water

  • Reduced friction and wear

  • Outstanding rust and corrosion protection

  • Long seal life

  • Superior foam prevention

  • Performs in all outboard lower units, stern drives, V-drives, bow and tunnel thrusters and marine transmissions that require either 75W-90 or 80W-90 and meet GL-4 or GL-5 specifications

Superior Formulation

AMSOIL Universal Synthetic 75W/80W-90 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 an extreme pressure lubricant that provides superior protection from shock loading caused by propeller cavitation. Cavitation is common in high-horsepower, high-torque applications and occurs when the propeller spins too quickly, mixing air with water and losing traction, causing vibration, noise and lower unit shock loading. AMSOIL Universal Synthetic Marine Gear Lube offers superior protection for fast accelerating, high-torque/horsepower engines by protecting against shock loading from cavitation of heavily loaded engines.

Outstanding Protection Against Rust and Corrosion

AMSOIL Universal Synthetic 75W/80W-90 Marine Gear Lube is marine formulated, so it protects against rust and is compatible with aluminum, copper and brass alloys.

Water Resistant

AMSOIL Universal Synthetic 75W/80W-90 Marine Gear Lube is water resistant.  It promotes longer seal life, preventing excessive water leakage, and it maintains extreme pressure protection, even when contaminated with as much as 10% water. Water contamination can increase the likelihood of foaming. The presence of foam in a lubricant disrupts oil film and promotes wear.
     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 test demonstrates that AMSOIL Universal Synthetic Marine Gear Lube is not affected by water and provides 50% more extreme pressure protection than its competitors for long gear and bearing life.

  • The Foam Stability Test demonstrates that conventional gear lubes can foam when mixed with water, yet AMSOIL Universal Synthetic Marine Gear Lube aced the test with absolutely no foam!

 
Extreme Pressure and Foam Stability Testing
 
    AMSOIL Synthetic
Universal Marine
Gear Lube
Conventional
Gear Lube "A"
Conventional
Gear Lube "B"
 
  Test No Water With 10% Water No Water With 10% Water No Water With 10% Water  
  FALEX Extreme Pressure Load Test B (LbF)*
(ASTM D-3233B)

1500

1500

1100

1000

1000

1000
 
  Foam Stability
(ASTM D-892):
             
       Sequence I 0/0 0/0 0/0 0/0 0/0 375/290  
       Sequence II 0/0 0/0 0/0 20/0 0/0 590/0  
       Sequence III 0/0 0/0 0/0 0/0 0/0 380/305  
  *The FALEX Test 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.  


Multiple Applications

AMSOIL Universal Marine Gear Lube is SAE 75W/80W-90 and replaces both 75W-90 and 80W-90 gear lubes.

Service Life

Follow manufacturers recommended service intervals. It is generally a good idea to change gear lube at the end of the season prior to storage.

Applications

AMSOIL Universal Synthetic 75W/80W-90 Marine Gear Lube is recommended for fresh and salt water applications and performs in all outboard lower units, stern drives, V-drives, bow and tunnel thrusters and marine transmissions that require either 75W-90 or 80W-90 and meet GL-4 or GL-5 specifications. AMSOIL Universal Synthetic Marine Gear Lube may be used in (but is not limited to) the following applications:
 

 
Recommended Applications for
AMSOIL Universal Synthetic Marine Gear Lube
 
  Outboard Lower Units
  • Bombardier
  • Force/US Marine
  • Harbormaster Marine Outboard Drives
  • Honda
  • Johnson/Evinrude
  • Mercury/Mariner
  • Nissan
  • Sears Gamefisher and Seagull
  • Suzuki
  • Tohatsu
  • Yamaha
 
  Stern Drives
  • Konrad
  • Marine Drive Systems
  • Mercruiser-Bravo
  • OMC/Bombardier
  • Volvo-Penta
  • Yanmar
 
  V-Drives
  • Casale & Menkens
 
  Bow & Tunnel Thrusters
  • Harbormaster Marine
 
  Marine Transmissions
  • ZF Marine Transmission
 
 
 
AMSOIL Universal Synthetic 75W/80W-90 Marine Gear Lube
Product Code

Pkg./Size

AGMTB-EA 13-Ounce Tube
AGMTB-CA 13-Ounce Tubes (case of 6)
AGMQT-EA Quart Bottle
AGMQT-CA Quart Bottles (case of 12)
AGM16-EA 16-Gallon Key
AGM05-EA 5-Gallon Pail
AGM30-EA 30-Gallon Drum
AGM55-EA 55-Gallon Drum

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Check It Out!Check Out the AMSOIL Online Product Application Guide

Want to know which engine oil, transmission oil and gear lube is appropriate for your vehicle and the quantities required? Need to find the correct product codes for your vehicle's filtration requirements? Or, do you have a manufacturer part number of the filter you are currently using and would like to cross reference it? The AMSOIL Online Product Application Guide is the place with the answers!


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AMSOIL, the leader in automotive synthetic lubrication, produced the world’s first API-qualified synthetic motor oil in 1972. Trust the extensive experience of AMSOIL, The First in Synthetics®, to do the best job protecting your engine.

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