ISO VG 320, AGMA 6 Oil

Oils classified as ISO VG 320 or AGMA 6 lubricants are designed to fulfill the lubrication requirements of various industrial, mobile, and construction machinery. Some of these applications include use as a rock drill oil, hydraulic oil, gear lube, EP gear lubricant, compressor oil, and general-purpose R&O oil. Though these classifications are derived from different sources, they refer to the same thing (I.e. oil viscosity).

ISO VG 320 oils have a midpoint kinematic viscosity of 320 mm²/s (or Cst, centistokes). This number is equivalent to an average of the minimum and maximum viscosities derived from AGMA testing. In the case of an AGMA 6 oil, these numbers are 288 mPa.S and 352 mPa.S respectively. Though these numbers do roughly equate to the same thing, it is best to consult with OEM specifications before employing any new oil in a system or machine.

Click here to view or print the Comparative Viscosity Chart.

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