AMSOIL ISO 22 100% Synthetic Anti-Wear Hydraulic Oil
Formulated with advanced synthetic technology to protect hydraulic systems from wear, rust, and oxidation. Designed for high-pressure, high-load and heavy-duty operations, ensuring smooth performance and long-lasting protection. Superior cold-weather fluidity allows for immediate flow, reducing strain on equipment and improving productivity.
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Product data sheets
View, download, or save a copy of the Product Data Sheet or Safety Data Sheet for AMSOIL ISO 22 100% Synthetic Anti-Wear Hydraulic Oil.
AMSOIL ISO 22 100% Synthetic Anti-Wear Hydraulic Oil
AMSOIL ISO 22 100% Synthetic Anti-Wear Hydraulic Oil (product code AWG) is the lightest viscosity in the AMSOIL Synthetic AW Series, formulated for cold-climate mobile equipment, low-temperature presses, and zinc-bearing hydraulic systems that specify an ISO VG 22 anti-wear fluid. The synthetic base oils stay fluid below -60 degrees Celsius while the zinc-based anti-wear additive system protects pumps, motors, and valves through the full temperature swing.
Zinc-based anti-wear additive system
AWG is fortified with zinc-based anti-wear additives that shield gear, vane, and piston pumps from boundary-lubrication wear under high pressure. ASTM D4172 Four-Ball Wear testing at 40 kg, 1,200 rpm, 75 degrees Celsius, and 60 minutes produced a wear scar of 0.45 mm. Copper Strip Corrosion results of 1A under ASTM D130 confirm the formula is non-aggressive to copper, brass, and bronze valve components.
Ultra-high viscosity index for wide-temperature operation
Hydraulic systems that cycle from sub-zero startups to elevated working temperatures need a fluid that holds film strength at heat without thickening into a pumpability problem in the cold. AWG carries a viscosity index of 256 under ASTM D2270, holding 5.9 cSt at 100 degrees Celsius and 20.7 cSt at 40 degrees Celsius under ASTM D445. The wide, flat viscosity profile keeps pump output and cylinder speed consistent across season and shift.
Excellent cold-weather flow
Conventional ISO 22 hydraulic oils thicken in deep cold because of paraffinic wax content. AWG uses wax-free synthetic base oils and posts a pour point below -60 degrees Celsius (below -76 degrees Fahrenheit) under ASTM D97, so pumps, bearings, valves, and cylinder seals receive lubrication at the first crank instead of dry-starting through a slug of gelled fluid. Reliable cold flow reduces the pressure spikes that rupture hoses, blow seals, and crack pump housings during winter startup.
Oxidation and varnish resistance
Naturally resilient synthetic base oils combined with a potent anti-oxidant package resist the chemical breakdown that produces sludge, varnish, and acid in hot reservoirs. Cleaner systems mean fewer plugged orifices, fewer sticking servo valves, and longer life on hydraulic filters. The additive system also resists rust during humid storage and seasonal layup, with both fresh water and synthetic sea water passing the ASTM D665 A and B rust tests.
Water shedding and air release
AWG separates rapidly from contaminating water rather than holding a stable emulsion, recording 40/40/0 in the ASTM D1401 Demulsibility test within 10 minutes. Fast water shedding protects bearings and additive chemistry from hydrolysis. Foam control results of 0/0, 0/0, 0/0 across Sequences I, II, and III of ASTM D892 keep entrained air from collapsing into vapor bubbles that erode pump internals and cause spongy actuator response.
Dielectric strength and seal compatibility
A dielectric breakdown voltage of 43.6 kV AC under ASTM D877 gives the fluid an electrical-isolation margin appropriate for service alongside solenoid valves and servo-electronic packs. The formula is compatible with standard hydraulic seal elastomers, with petroleum hydraulic oils, and with most synthetic hydraulic oils. It is not compatible with phosphate-ester, silicone, or water-based fluids and must not be cross-blended into those systems.
Recommended applications and service intervals
AWG fits high- and low-pressure gear, vane, and piston stationary and mobile hydraulic systems that specify an ISO VG 22 zinc-bearing anti-wear fluid. Typical service includes dump trailers, log splitters, snow-plow and salt-spreader hydraulics, cold-storage warehouse lifts, sub-zero industrial presses, and any winter-operated mobile hydraulic package where conventional oil thickens into pump cavitation. Within the AMSOIL AW Series, the lightest AWG grade is generally reserved for the coldest ambient operating range, while the AWH (ISO 32) and AWI (ISO 46) grades carry the broader OEM approval list for warmer service.
General-purpose service: ISO VG 22 mobile and stationary hydraulic systems where extended drain intervals are desired.
Severe service: cold-climate, mobile, and stationary systems operating at temperature extremes, with oil analysis used to set drain intervals.
Exclusions: not for systems specifying phosphate-ester, silicone, or water-based hydraulic fluids, and not for systems whose OEM specifies an R&O-only fluid free of zinc anti-wear chemistry.
Outside US and Canada: confirm local viscosity grade and OEM approval requirements against the equipment manufacturer service guide before installation.
For optimum performance, drain the system completely and, when warranted, flush before installation. AWG is compatible with standard hydraulic seal elastomers, petroleum hydraulic oils, and most synthetic hydraulic oils, but mixing dilutes the synthetic additive performance and shortens the effective drain interval. Pair the fluid with an AMSOIL hydraulic filter sized to the system flow rate, and use periodic oil analysis to verify cleanliness and additive depletion when stretching drain intervals.
Typical technical properties
Property
Value
ISO Viscosity Grade (ASTM D2422)
22
Kinematic Viscosity at 100 degrees C, cSt (ASTM D445)
5.9
Kinematic Viscosity at 40 degrees C, cSt (ASTM D445)
Rust Test, fresh and synthetic sea water (ASTM D665 A and B)
Pass
Order AMSOIL ISO 22 100% Synthetic Anti-Wear Hydraulic Oil
AMSOIL ISO 22 100% Synthetic Anti-Wear Hydraulic Oil ships in the AWG05-EA 5-gallon pail and is backed by the AMSOIL Limited Warranty for industrial lubricants. Confirm hydraulic system specification and viscosity requirements against the equipment service manual using the AMSOIL vehicle and equipment lookup guide, and compare ISO viscosity grades, anti-wear versus R&O chemistries, and seasonal selection in the ISO hydraulic oil guide before ordering. Order Now.
My dump trailer lifted easier in colder temps, pump strained less
By Mark from Colorado on June 05, 2025.
Would recommend this to a friend.
Hydraulic oil
So far I am impressed . Test of time will be the deciding factor . This hydraulic oil fluid is totally different in appearance and viscosity from traditional Hydraulic oils. I have trusted Amsoil for 30 years and I use their oils in all my equipment , ( boat, mowers ,2 cycle etc.) If it uses oil it runs on Amsoil.
ISO VG 22 is a light hydraulic grade with a kinematic viscosity near 22 cSt at 40 degrees Celsius. It is typically specified for cold-climate mobile hydraulic equipment, low-temperature presses, and systems whose equipment manufacturer calls for an ISO 22 anti-wear fluid. Heavier ISO 32, 46, and 68 grades are used in warmer ambient service or systems specifying those higher viscosities.
Is AWG an anti-wear or an R&O hydraulic oil?
AWG is a zinc-bearing anti-wear hydraulic oil with a full zinc dialkyldithiophosphate additive package. Anti-wear hydraulic oils protect pumps that run at boundary-lubrication conditions under high pressure. Rust and oxidation (R&O) hydraulic oils omit the zinc anti-wear chemistry and are typically reserved for low-pressure systems or systems with silver-containing pump components that require zinc-free chemistry.
What is the pour point of AMSOIL ISO 22 hydraulic oil?
The pour point falls below -60 degrees Celsius, equivalent to below -76 degrees Fahrenheit, under ASTM D97. That figure sits well below the pour point of conventional ISO 22 oils and is the reason AWG keeps pumping in deep winter starts where wax-bearing oils gel and starve the pump.
Can AWG be mixed with conventional hydraulic oil?
AWG is compatible with standard hydraulic system seals, petroleum hydraulic oils, and most synthetic hydraulic oils. Mixing dilutes the synthetic additive performance and shortens the effective drain interval, so a complete drain and, where warranted, a flush is the right step before installation. AWG must not be mixed into systems running phosphate-ester, silicone, or water-based hydraulic fluids.
What viscosity index does AMSOIL ISO 22 hydraulic oil carry?
The viscosity index is 256 under ASTM D2270. The wide-temperature profile is the basis for the formula's cold-flow performance and its resistance to thinning at elevated reservoir temperature.
Does AWG carry Denison HF-0 or Vickers I-286-S approval?
Within the AMSOIL Synthetic AW Series, the Denison HF-0/HF-1/HF-2, Vickers I-286-S, Cincinnati Milacron P-68, DIN 51524 Part 2, Ford M6C-32, and GM LH-04-1/LH-06-1/LH-15-1 approvals are listed on the ISO 32 (AWH) and ISO 46 (AWI) grades. AWG is the ISO 22 cold-climate grade and is selected when the equipment manufacturer specifies an ISO VG 22 anti-wear fluid.
Does using AWG void hydraulic equipment warranty coverage?
No. Using a properly specified synthetic anti-wear hydraulic oil that meets the equipment manufacturer viscosity and additive requirements does not void hydraulic equipment warranties under the federal Magnuson-Moss Warranty Act. AWG itself is backed by the AMSOIL Limited Warranty for industrial lubricants.
