What is Hydraulic VG 68 Oil?

If you have hydraulic systems and pumps, you need reliable hydraulic lubricants. ITR Lubricants is reputable for its excellent quality, high performance, and unrivaled products.

Hydraulic oil VG 68 is a mineral lubricant formulated to meet the requirements of a wide range of hydraulic equipment. The fluid contains antiwear and is resistant to corrosion, oxidation, and foam additives. Use Hydraulic oil VG 68 for your industrial, automotive, and agricultural hydraulic systems. 

What Does VG Mean in Hydraulic VG 68 Oil?

VG means viscosity grade. Hydraulic oil viscosity grade numbers are 22, 46, and 315 of the oil. 22 and 46 are ISO grade and refer to the fluid’s kinematic at 40.

What is ISO VG Meaning in ISO VG 68 Hydraulic Oil? 

ISO VG means International Standards Organization Viscosity Grade. The viscosity grade indicates that the fluid meets the international standards for hydraulic fluids. Hydraulic oil viscosity is the most important physical quality of lubrication requirements. 

The Difference Between 32, 46, and 68 Hydraulic Oil?


ISO Viscosity		  32 46 68
Approximate SAE 10W15W20W
API Gravity lbs/galASTM D-28731.6/7.2230.7/7.2629.7/7.31
Viscosity @ 40°C, CSTASTM D-44531.74769
Viscosity @ 100°C, CSTASTM D-4455.36.98.7
Viscosity IndexASTM D-22709810297
Pour Point F (C)ASTM D-97-38(-39)-33(-36)-27 (-33)
Flash Point, COCASTM D-92420F440F450F
Fire Point, COCASTM D-92445F465F475

What differentiates ISO 68 and AW 68 hydraulic Oil?

Hydraulic AW 68 lubricants have an International Standard Viscosity Grade (ISO VG) of 68. The grade stands for the thickness of the oil when tested at 40 degrees Celsius. ISO VG 68 hydraulic is a heavier fluid that flows at an equivalent SAE 20-weight lubricant. 

Hydraulic Oil Viscosity Measurement

To know and classify hydraulic oil viscosity grade, the unit of measurement used is dynes per square centimeter (dynes/cm2). Poise is the unit of viscosity measurement. A hydraulic system requires shear stress of 1 dyne/cm2 to produce a shear rate of one reciprocal second and a viscosity of one poise or 100 centipoises.

Why Choose ITR Lubricants Hydraulic Oils?

The company is reputable for its high quality, superior performance, and unrivaled value lubricant products. 

Qualities of ITR Lubricants oils:

  • Resistant to oxidation which ensures a machine’s long life.
  • Have excellent antiwear protection that withstands varied temperature ranges.
  • It has high shear stability to maintain viscosity in the oil for its entire life.
  • It has a high viscosity index to withstand freezing and high temperatures.
  • Strong resistance to corrosion and rust.
  • Resistant to foaming.
  • Compatible with all hydraulic machines and equipment.
  • Quality reserve assures long-term oil and equipment performance and life.
  • It has good water separation properties.

ITR Lubricants’ premium-grade hydraulic oils with good anti-wear properties protect the most demanding of systems while still meeting ISO standards for hydraulic oil.

To order hydraulic oil VG 68, request a quote from ITR Lubricants.

Frequently Asked Questions

Hydraulic oils are classified by their viscosity at hot ambient temperatures (SAE 10, SAE 20, SAE 30, etc.) or during winter (SAE10W, SAE20W, etc.). The number stands for the viscosity level at a specific temperature.

There are three basic types of hydraulic fluid namely; water-based, petroleum-based, and synthetic.

Hydraulic fluids are combustible. Water-based hydraulic fluids are not flammable. However, petroleum-based hydraulic fluids can catch fire at 148-315°C and auto-ignite at 260-398°C, which makes them combustible and not flammable.