Commercial-Grade Hydraulic Oil - ISO 32Product Code : HCG32TP-EA• Provides strong wear protection to protect pumps and motors • Resists corrosion for long component life• Fights sludge to help maintain the cleanliness and operability of pumps, valves, solenoids and other components• Provides good filterability for maximum fluid performance and life• Resists foam to guard against cavitation and promote efficient operation
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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 32 Commercial-Grade Hydraulic Oil.
AMSOIL ISO 32 Commercial-Grade Hydraulic Oil (HCG32) is a hydrotreated anti-wear hydraulic fluid built for industrial and mobile hydraulic systems that consume high volumes of oil. The ISO VG 32 viscosity grade is the standard light-duty AW grade for indoor shop equipment, machine tools, presses, mobile equipment in temperate weather, and any high- and low-pressure gear, vane, or piston pump that calls for an HM-class anti-wear hydraulic fluid. This formula delivers an optimal mix of price and protection for owners of fleets, farms, shops, and job-site equipment that need reliable wear control without the spend of a full synthetic.
Anti-wear protection for pumps, motors, and valves
The HCG32 additive system uses zinc-based anti-wear chemistry to keep pumps, motors, valves, and other internal components running cleanly under load. Four-Ball Wear testing (ASTM D4172, 75 C, 1200 rpm, 40 kg, 1 hour) yields a 0.55 mm wear scar, and FZG gear-rig results (A/8.3/90) clear 12 load stages without failure. That level of film strength helps gear, vane, and piston pumps last as designed and reduces unscheduled maintenance on stationary and mobile circuits alike.
Foam, air-release, and cavitation defense
Foam-laden oil compresses, makes hydraulic actuators feel spongy, and starves pumps of solid fluid which leads to cavitation damage. HCG32 carries an anti-foam additive package that posts 0/0 ml results across all three foam sequences in ASTM D892 (Seq. I, II, and III). The fluid releases entrained air quickly and stays incompressible at the pump inlet, which protects gears and vanes against the pitting and erosion that come with collapsing air bubbles.
Oxidation and corrosion resistance
Hydraulic systems run hot and trap moisture, and oxidized fluid forms varnish, sludge, and acidic byproducts that pit valves and stick spools. HCG32 resists oxidation, fights corrosion, and earns a 1A copper strip rating in ASTM D130 (100 C, 3 hours), which means the formula is safe for systems with bronze, brass, and yellow-metal components such as bushings, bearings, and pump rotors. Sludge control keeps solenoids, servo valves, and proportional valves cleaner over the service interval.
Water separation and filterability
Demulsibility (ASTM D1401) results of 40-40-0 in 15 minutes show that HCG32 separates from water quickly, allowing condensate and tramp water to be drained or stripped at the reservoir before they reach the pump. Good filterability lets the fluid pass through fine reservoir, suction, and pressure-line elements without plugging, which extends element service life and supports the cleanliness levels modern proportional and servo systems require.
OEM and industry specifications met
HCG32 is qualified to a wide list of industrial and mobile hydraulic specs, including ISO 11158 (HL and HM), ASTM D6158 (HM and HP), DIN 51524 Part II, GM LS-2, AIST (U.S. Steel) 126, Bosch Rexroth RD/E 90235, Eaton E-FDGN-TB002-E, Eaton brochure 03-401-2010, Fives Cincinnati P-68, and Parker (formerly Denison) HF-0, HF-1, and HF-2. Coverage of HF-0 through HF-2 is the spec most equipment owners look for when sourcing an AW hydraulic fluid for a sensitive Parker or Denison piston pump.
Recommended applications and service intervals
Use AMSOIL ISO 32 Commercial-Grade Hydraulic Oil in high- and low-pressure gear, vane, and piston stationary and mobile hydraulic systems, including those built with bronze metallurgy, that call for any of the listed specifications. The ISO VG 32 grade is the right pick for indoor industrial equipment, machine tools, hydraulic presses, injection molding machines, and mobile equipment running in moderate ambient temperatures. Drain intervals follow the equipment manufacturer's published schedule, with adjustments based on oil analysis, operating temperature, contamination level, and duty cycle.
Industrial fit: machine tools, presses, injection molding, broaching machines, and shop hydraulic power units that specify an AW HM grade.
Mobile fit: skid steers, telehandlers, log splitters, lifts, dump trailers, and other off-road hydraulic systems running indoors or in moderate climates.
Switch to ISO 46 or ISO 68 for hot-running systems, high ambient temperatures, or where the OEM calls for a heavier viscosity grade.
Not for use in automotive automatic transmissions, power steering systems, or aviation hydraulics; for those, follow the relevant OEM-specific fluid spec listed in the equipment service guide.
Pair HCG32 with a properly rated AMSOIL hydraulic filter and follow the OEM's element-change schedule. Mixing this product with another hydraulic fluid is not recommended; if a top-off with a different brand is unavoidable, plan a full reservoir flush at the next service interval. Aftermarket additive packages are not required and may unbalance the existing additive system.
Foam Characteristics, ml (ASTM D892), Seq. I / II / III
0/0, 0/0, 0/0
Demulsibility, min (ASTM D1401)
40-40-0 (15)
FZG A/8.3/90, Load Stage Fail
12
Order AMSOIL ISO 32 Commercial-Grade Hydraulic Oil
AMSOIL ISO 32 Commercial-Grade Hydraulic Oil ships in a 2.5 gallon jug (HCG32TP-EA), a case of two 2.5 gallon jugs (HCG32TP-CA), and a drum (HCG3255-EA) for shop and fleet use. Coverage is backed by the AMSOIL Limited Warranty. For viscosity confirmation against an owner manual or OEM spec sheet, use the AMSOIL vehicle lookup guide. For a side-by-side on ISO 22, 32, 46, 68, and 100 grades, AW versus R&O fluids, and equivalent-chart guidance, see the ISO hydraulic oil guide. Ready to buy AMSOIL ISO 32 Commercial-Grade Hydraulic Oil now.
Frequently asked questions
What is ISO 32 hydraulic oil used for?
ISO 32 hydraulic oil is a light-viscosity anti-wear fluid used in industrial and mobile hydraulic systems that run at moderate temperatures, including machine tools, presses, injection molding machines, and indoor power units running gear, vane, or piston pumps. The grade flows easily on cold start and still carries enough film strength to protect components under load.
Is ISO 32 hydraulic oil the same as AW 32?
For practical purposes, yes. AW 32 is the common shop name for an anti-wear hydraulic fluid at ISO viscosity grade 32. AMSOIL HCG32 is an AW-style fluid that meets ISO 11158 HM, ASTM D6158 HM, and DIN 51524 Part II, the formal HM (anti-wear) classifications behind the AW label.
What viscosity is ISO 32 hydraulic oil?
ISO VG 32 is a light-duty industrial viscosity grade. HCG32 measures 33.8 cSt at 40 C and 5.7 cSt at 100 C with a viscosity index of 110, the right band for cool to moderate ambient temperatures and tight-tolerance servo and proportional valves.
Can ISO 32 and ISO 46 hydraulic oil be mixed?
Mixing different ISO grades thins or thickens the system fluid and shifts performance away from the OEM target viscosity, so it is not recommended as a standard practice. If a small top-off across grades is unavoidable in the field, schedule a full drain and refill back to the correct grade at the next service.
Is HCG32 safe with bronze and yellow-metal components?
Yes. HCG32 earns a 1A rating in the ASTM D130 copper strip corrosion test (100 C, 3 hours), the highest cleanliness rating, and the formula is approved for systems with bronze metallurgy. That covers Parker (formerly Denison) HF-0, HF-1, and HF-2 piston pumps and other industrial pumps with brass or bronze components.
Is ISO 32 thinner than ISO 46 hydraulic oil?
Yes. ISO 32 is the lighter grade, with a kinematic viscosity centered on 32 cSt at 40 C, while ISO 46 is centered on 46 cSt at 40 C. ISO 32 is preferred for cooler ambient temperatures and tight-tolerance servo and proportional systems, while ISO 46 is the common pick for warmer environments and heavier-duty mobile equipment.
Is HCG32 a synthetic hydraulic oil?
HCG32 is a hydrotreated, conventional-base AW hydraulic oil tuned for budget-conscious commercial fleets and high-volume reservoirs. Owners who want a full-synthetic AW hydraulic fluid for extended drain intervals, wider operating temperature range, and lower deposit formation should look at AMSOIL synthetic anti-wear hydraulic oil (AWH) at the matching ISO grade.
