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Synthetic AW Series Antiwear Hydraulic Oils

Product Codes: AWF, AWG, AWH/AHO, AWI, AWJ, AWK


AMSOIL Synthetic AW Series Antiwear Hydraulic Oils are shear stable, long-life lubricants based on high quality synthetic oil technology. These oils are formulated with a premium additive system that inhibits oxidation (preventing acid and viscosity increase), inhibits rust, and inhibits foam (preventing spongy hydraulics). AMSOIL AW Oils also contain a very effective zinc-based antiwear/antioxidant additive which prevents wear in high speed, high pressure vane and gear pumps while meeting the lubrication requirements of axial piston pumps having bronze-on-steel metallurgy. AMSOIL AW Oils are designed for long life and typically reduce maintenance costs by extending drain intervals and reducing labor associated with repairs, down time, and change outs.

Amsoil Synthetic Base Oil Technology

AMSOIL's synthetic base oils are thermally and oxidatively stable, preventing carbon or varnish deposits. The very high viscosity indicies, low pour points, and lack of parrafins (wax) make these good all season lubricants well suited for temperature extremes. At high temperatures and pressures, these oils will provide a good lubricating film and protect components against wear. During cold temperature operation, equipment will start easier and the need for preheating with sump heaters is reduced. The AW Series base oils are hydrolytically stable and they readily separate from water. This prevents unwanted oil/water emulsions that inhibit an oil's ability to lubricate, allows for longer lubricant life, and means water can easily be drained from the sump.


  • Anti-wear protection for high pressure systems
  • Recommended for gear, vane and piston pumps
  • Rust, oxidation and foam inhibited
  • Designed for extreme temperature operations
  • Hydrolytically stable and readily separates from water


  • Denison HF-0, HF-1 and HF-2
  • Vickers M-2950-S and I-286-S
  • Cincinnati Milacron P-68, P-69 and P-70
  • U.S. Steel 127 and 136
  • Racine, variable volume vane pumps
  • DIN 51524, Part 2
  • AFNOR E 48-603
  • Ford M-6C32
  • GM LH-04-1, LH-06-1 and LH-15-1
  • Lee Norse 100-1
  • Jeffrey No. 87
  • BF Goodrich 0152
  • Commercial Hydraulics *

* Except for PM-500 series silver-containing pumps which require R&O additive systems.


The correct viscosity grades of AMSOIL Synthetic AW Series Antiwear Hydraulic Oils are recommended for high and low pressure gear, vane and piston stationary and mobile hydraulic systems. They meet the performance requirements of all major hydraulic manufacturers and are excellent for general purpose use where extended drain intervals are desired and in severe duty operations where temperature extremes are encountered. Even though recommended for all-season use, AWF and AWG are the preferred choice for temperatures less than -20 F because these oils are light-bodied and have very good cold temperature properties.

Some applications include machine tools and presses, mobile construction equipment, farming equipment, logging trucks, boom trucks and plastic injection molding machines. The appropriate viscosity grade of AW Oils are also suitable for use in pneumatic tools, speed reducers, spindles and R & O gear applications

The ability of the AW Series to extend drain intervals is subject to operating conditions and maintenance practices. Monitoring by oil analysis is recommended.

AMSOIL AW Series Oils are compatible with hydraulic system seals, petroleum hydraulic oils, and most synthetic hydraulic oils 1. For optimum performance it is recommended that the system be thoroughly drained and if warranted, cleaned prior to installation.

1 Not compatible with phosphate ester or silicone fluids.


AMSOIL products are available in 5-gallon pails, 30-gallon drums (AWH only), 55-gallon drums, 275-gallon totes and bulk quantities. For 275-gallon totes, please allow two to four weeks for delivery.

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.

Typical Technical Properties

Synthetic AW Series Antiwear Hydraulic Oils AWF
ISO 15
ISO 22
ISO 32
ISO 46
ISO 68
ISO 100
ISO VG - ASTM D-2422 15 22 32 46 68 100
VK 100C - ASTM D-445 4.55 5.83 6.75 9.10 11.73 15.98
VK 40C - ASTM D-445 15.23 20.93 32.46 47.48 66.99 98.82
Viscosity Index - ASTM D-2270 244 250 172 177 172 174
SPGR - ASTM D-1298 0.8294 0.8363 0.8576 0.8591 0.8670 0.8713
Density - ASTM D-1298 6.906 6.964 7.141 7.153 7.219 7.255
Flash Point C (F) - ASTM D-92 172 (341) 174 (345) 244 (471) 238 (460) 242 (467) 248 (478)
Fire Point C (F) - ASTM D-92 184 (363) 188 (370) 262 (503) 258 (496) 262 (503) 260 (500)
Pour Point C (F) - ASTM D-97 -67 (-89) -65 (-85) -57 (-70) -51 (-60) -48 (-54) -48 (-54)
Four-Ball Wear Test - ASTM D-4172 (40 kg, 1200 rpm, 75 C, 60 min.) 0.48 0.45 0.44 0.40 0.40 0.40
Copper Strip Corrosion Test - ASTM D-130 1A 1A 1A 1A 1A 1A
Foam - ASTM D892 Sequence I, II, III Test End 0/0/0 0/0/0 0/0/0 0/0/0 0/0/0 0/0/0
Dielectric Strength - ASTM D877 Voltage, kV AC >40 >40 >40 >40 >40 >40
Viscosity - ASTM D445 @ 0F 72 105 792 1232 2638 5873
Viscosity - ASTM D445 @ -20F 250 357 2228 3480 10155 31402*
Viscosity - ASTM D445 @ -40F 1906 2020 7881 12690 * *
Demulsibility - ASTM D1401 Oil/Water/Cuff (min) 40/40/0 (15) 40/40/0 (15) 40/40/0 (15) 40/40/0 (15) 40/40/0 (20) 41/39/0 (20)
Rust Test - ASTM D665 A & B Fresh Water and Synthetic Sea Water Pass Pass Pass Pass Pass Pass
* Generally not recommended for hydraulic system use at this temperature