The Original Synthetic Oil
AMSOIL Long Life Synthetic Gear Lube SAE 80W-140 (FGO)
Long Life Synthetic Gear Lube SAE 80W-140 (FGO)

Specifically engineered for extended drain intervals
up to 500,000 miles as set by equipment
manufacturers for over-the-road trucks and heavy
equipment. Provides long life in passenger cars and
trucks. Protects against wear and improves
equipment life. Excellent "All Season" summer and
winter performance. Outperforms all conventional
gear oils. Compatible with most limited-slip
differentials.
Package sizes include:

5-Gallon Pail
16-Gallon Keg
30-Gallon Drum
55-Gallon Drum
PRODUCT DESCRIPTION
AMSOIL Long Life Synthetic Gear Lubes are extended drain gear lubes engineered specifically to
last several times longer and protect gears better than all conventional gear oils. These exclusive
AMSOIL formulations of premium synthetic base oils and high performance additives resist acid,
carbon and varnish formation from oxidative breakdown. Components run cleaner and last longer.
AMSOIL Long Life Synthetic Gear Lubes are shear stable and friction reducing. They maintain their
viscosity during extended service for maximum wear control and they are fuel-efficient. The superior
cold temperature fluidity and high temperature stability properties of AMSOIL Long Life Synthetic
Gear Lubes make them excellent for all-season use. Equipment lasts longer and maintenance costs
are reduced with AMSOIL Long Life Synthetic Gear Lubes.

Applications
AMSOIL Long Life Synthetic Gear Lubes, in the correct viscosity grades, are recommended for all
domestic and foreign applications such as over-the-road trucks, light, medium and heavyduty trucks,
off-road equipment, commercial vehicles, motorhomes, autos, SUVs, emergency vehicles, busses,
delivery/utility vehicles and tractors.

Use AMSOIL Extended Drain Synthetic Gear oils in differentials, manual transmissions or other gear
applications where one or more of the following standards are specified: API GL-5 & MT-1, MIL-PRF-
2105E, Dana SHAES 234 (Formerly Eaton PS-037) for 250,000 miles, Dana SHAES 256 (Formerly
Eaton PS-163) for 500,000 miles, Mack GO-J & GO-J+, Meritor 0-76N (75W-90) & 0-80 (80W-140),
and Navistar TMS 6816 plus hypoid gear oil specifications from all foreign and domestic
manufacturers such as GM, Ford and Daimler Chrysler. Can also be used in rear axles where API
Service GL-4 lubricant is recommended.

AMSOIL Long Life Synthetic Gear Lubes provide:

  • High Load Gear and Bearing Protection
  • Reduced Operating Temperatures
  • Rust and Corrosion Protection
  • Better Cold Weather Shifting
  • Improved Efficiency
  • Improved Seal Life
Kinematic Viscosity @ 100°C, cSt (ASTM D-445)
26.4
Kinematic Viscosity @ 40°C, cSt (ASTM D-445)
257.6
Viscosity Index (ASTM D-2270)
133
Pour Point °C (°F) (ASTM D-97)
-40 (-40)
Flash Point °C (°F) (ASTM D-92)
218 (424)
Brookfield Viscosity, cP (150,000 Max)
59,926 @ -26°C
Copper Corrosion (ASTM D-130) 1b Max @ 121 °C (250°F) / 3hr
1b
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 Long Life Synthetic Gear Lubricant 80w-140 (FGO)
  NORMAL
SEVERE
Cars, SUV, Light & Medium
Duty Trucks
Drain at 100,000 miles of
service or according to the
owner’s manual, whichever is
longer
Drain at 50,000 miles of service
or according to the owner’s
manual, whichever is longer
Heavy Duty Class 8 Line Haul
Follow the OEM drain interval (miles or hours) for synthetic oil up
to 250,000 miles or 3 years, whichever comes first. Otherwise,
drain at twice the OEM interval for conventional oil.
Heavy Duty Off-Road
Vocational
Follow the OEM drain interval (miles or hours) for synthetic oil up
to 120,000 miles or 1 year, whichever comes first. Otherwise,
drain at twice the OEM interval for conventional oil.
For product service life in differentials, consult your owner's manual or the Original Equipment
Manufacturer (OEM) to establish the application, NORMAL or SEVERE.

For product service life in non-differential applications, consult owner's manual or the OEM for
either normal or severe synthetic oil service intervals. Where service intervals are unavailable,
drain at twice the interval for conventional oil.

Note: AMSOIL does not support extended drain intervals where water contamination occurs.
Check and service the gear oil frequently when water contamination is possible.

Gear oils should be changed more frequently when operating vehicles or equipment in dusty
or dirty conditions unless the gear system is properly sealed and equipped with membrane
type breathers.

AMSOIL LONG LIFE SYNTHETIC GEAR LUBES are compatible with conventional gear oils,
however mixing oils reduces the benefits and nullifies the extended service life
recommendations.

AMSOIL LONG LIFE SYNTHETIC GEAR LUBES are compatible with most limited slip
differentials. If limited slip differential chatter occurs, add AMSOIL Slip-Lock™ friction modifier
additive.

AMSOIL LONG LIFE SYNTHETIC GEAR LUBE 75W-90 replaces competitors' 75W-90 and
80W-90 viscosity grades
Copyright 2008 All Service Oil  All Rights Reserved
All Service Oil
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