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Amsoil Heavy Duty Grease

Synthetic GH Series Heavy-Duty EP Grease

Extreme-pressure, moly-fortified. Provides outstanding protection for four wheel drive steering knuckles, spring shackles, heavy equipment pivot joints and other components operating in high-load, low-speed conditions. NLGI #1 is preferred for cold temperatures and auto pumping systems. Offers excellent water washout resistance.

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Package sizes include:

14-oz. Cartridge
14-oz. Cartridges (case of 10)
14-oz. Cartridges (case of 40)
35-lb. Lug
120-lb. Keg
400-lb. Drum

AMSOIL GH Series Heavy Duty EP Grease is composed of synthetic base oils and lithium-complex thickeners that provides the film strength, shear resistance, and mechanical stability critical to high load protection. This combination excels in high and low operating temperature ranges by providing excellent oxidation stability, high temperature dropping points and good low temperature torque values and pumping capabilities. AMSOIL Heavy Duty EP Grease is compounded with oxidation and corrosion inhibitors, effective oil soluble EP additives and molybdenum disulfide (moly) solid EP additives for all around protection in severe conditions.

AMSOIL Heavy Duty EP Grease is formulated with a top performing lithium complex thickener system that provides excellent water resistance as identified by the ASTM D-1264 water washout test. AMSOIL Heavy Duty EP Grease adheres to metal and is shear stable during severe mechanical activity, maintaining consistency and providing superior lubrication protection.


  • Moly Fortified for added EP protection
  • Adhesive and Shear Stable - prevents squeeze out
  • High dropping point (exceeds 500ºF)
  • Excellent water-washout resistance
  • Oxidation and corrosion inhibited
AMSOIL Heavy Duty EP Grease in grade #1 is recommended for use in manual or automatic lubricating systems. NLGI #1 (GHB) grease has better mobility and is the preferred choice for colder applications, automatic lubrication systems with long pumping runs and other applications (where recommended by manufacturer).

The correct consistency grade of AMSOIL Heavy Duty EP Grease is recommended for use in heavy and light duty applications found in manufacturing plants, automotive applications, agricultural equipment and construction equipment. These include, but are not limited to, roller bearings, plain bearings, gears, bushings, wheel bearings, chassis lubrication, universal joints, ball joints, tie-rod ends, steering knuckles, and heavily loaded pivot pins on mining and off road equipment such as power shovels, draglines, wheel and back hoe loaders, excavators and bulldozers. AMSOIL Heavy Duty EP Greases are suitable for use up to 325º F. When operating at elevated temperatures, frequent regreasing may be required.

AMSOIL Heavy Duty EP #1 and #2 Greases are compatible with many other types of grease. However, it is recommended that when changing greases, the equipment be cleaned of the old grease when possible or flushed with a liberal amount of AMSOIL Heavy Duty EP Grease while the mechanism is in operation. Closely monitor the system for any inconsistencies. Any grease compatibility questions should be referred to your AMSOIL representative or AMSOIL INC.

Maintaining a clean work environment is important when equipment greasing is performed. Wipe grease fittings clean prior to injecting grease to prevent contaminant ingestion. Maintain bearing housings one-third to one-half full of grease. Do not over-grease as excessive heat buildup can result. Supplement standard grease maintenance by periodically cleaning and packing housings with fresh grease on an established maintenance schedule.

AMSOIL GH Series Greases are available in 14-oz. cartridges, 35-lb. pails, 120-lb. kegs and 400-lb. drums.

AMSOIL Industrial Lubricants are stocked in Superior, Wisconsin and in select regional distribution centers throughout the United States and Canada. AMSOIL will stock additional quantities of lubricants or special order products based on customer requests and regional demands.

Synthetic GHB Grease - Typical Technical Properties

Thickener lithium complex NR
Fortified with moly compound yes NR
NLGI consistency grade 1 NR
NLGI performance grade GC-LB NR
Penetration - ASTM D 217 (25°C [77°F], 0.1 mm) worked 60 strokes 310-340 220-340 min
Dropping point, °F[°C] - ASTM D2265 500[260] 428[220] min
High temperature life, hours - ASTM D 3527 112 80 min
Oxidation stability, psi - ASTM D 942 (100 hr/300 hr) 0/5 max NR
Water washout, percent - ASTM D 1264 9.2 15 max
Rust and corrosion - ASTM D 1743 pass pass
Oil separation, percent loss - ASTM D 1742 (24 hours, 25°C [77°F] 3.3 6.0 max
Leakage, g lost - ASTM D 4290 <6.0 10 max
Four ball wear test, mm scar - ASTM D 2266 0.40 0.60 max
Fretting wear, mg - ASTM D 4170 3.5 10 max
Four ball EP, kgf - ASTM D 2596

Weld point

Load wear index



200 min

30 min

Timken OK load test, lbs - ASTM D 2509 70 NR
Low temperature torque, N*m - ASTM D 4693 (-40°C [-40°F]) 0.50 15.5 max
LT-37 pumpability, g/min (60°F/0°F [16°C/-18°C]) 750/26 NR
Copper corrosion - ASTM D 4048 1B NR
Disc brake wheel bearing specifications

Ford ESA-M1C 198A

Chrysler MS-3701





Oil viscosity:

40°C [104°F], cSt

100°C [212°F], cSt





Flash point, °F[°C] - ASTM 92 450[232] NR
Color purple/black NR
Texture smooth NR
NA: Not applicable
NR: Not required for NLGI GC-LB labeling

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