Multi-Viscosity Hydraulic Oil

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ISO22, ISO32, ISO46, ISO68

All-Season, Anti-Varnish, Anti-Wear

Synthetic Multi-Viscosity Hydraulic Oil is formulated with varnish-control technology to keep hydraulic systems cleaner for long life and reliable operation. It resists breakdown in the presence of heat while remaining fluid when cold to keep valves, pumps, servos and other components clean, protected and long-lasting. Synthetic Multi-Viscosity Hydraulic Oil is the perfect solution to the common problems that plague hydraulic applications, helping you save money.

Maximum Cleanliness

Synthetic Multi-Viscosity Hydraulic Oil is fortified with anti-varnish additives that chemically react with the building blocks of varnish, inhibiting its formation. It helps hydraulic systems remain clean for solid performance, immediate response and fewer breakdowns.

Excellent Year-Round Protection

Multi-Viscosity Hydraulic Oil's naturally heat-resistant base oils resist thermal break-down and maintain their protective viscosity, allowing formation of a strong lubricating film for excellent wear protection. Because it doesn’t contain the waxes inherent to conventional fluids, it flows more readily in cold temperatures, meaning bearings and other components receive almost immediate lubrication at start up, reducing long-term wear and instances of pressure spikes and erratic operation as a result of poor fluidity.

  • All-season performance
  • Maintains cleanliness
  • Promotes maximum fluid life
  • Resists foam
  • Maximizes energy efficiency
Aluminum Beaker Oxidation Test
Aluminum Oxidation Test April 2012
  • Left - Leading Conventional Hydraulic Fluid (ISO46)
  • Right - Amsoil Synthetic Multi-Viscosity Hydraulic Oil (ISO46)

Excessive oxidation results in harmful deposits and varnish that cause a host of problems, including stuck valves and decreased efficiency. In severe oxidation testing, Amsoil Synthetic Multi-Viscosity Hydraulic Oil resisted elevated heat and oxidation more effectively than the conventional fluid.

Fights Component Wear

Synthetic Multi-Viscosity Hydraulic Oil features a shear-stable formulation fortified with the latest zinc-type anti-wear additives. It meets the stringent viscosity-retention requirements of Parker Hannifin* (Denison*) HF-0 and demonstrates excellent anti-wear performance and compatibility with yellow metals in standardized laboratory and pump manufacturer tests (see below). Synthetic Multi-Viscosity Hydraulic Oil demonstrates excellent protection for pumps, motors, valves and other components against wear.

Yellow Metal Piston and Vane Pump Cam Ring
Left: Yellow Metal Piston Shoes
Right: Vane Pump Cam Ring

After 608 hours of strenuous pump testing in a Parker Hannifin (Denison) T6H20C Hybrid pump, the piston shoes demonstrated only moderate polishing and trace, random scratches, proving AMSOIL Synthetic Multi-Viscosity Hydraulic Oil excels at protecting yellow metals. The vane pump cam ring exhibited only light polishing and trace scratching, further confirming the excellent wear protection provided by the oil.

Applications & Specifications

The correct viscosity grade of AMSOIL Synthetic Multi-Viscosity Hydraulic Oil is recommended for high-pressure and low-pressure gear, vane and piston stationary and mobile hydraulic systems, including those with bronze metallurgy. It is recommended for all types of applications requiring the following industry and equipment specifications.

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