September 29, 2020

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New ASTM International guide outlines techniques to measure viscosity of in-service oil
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ASTM International’s committee on petroleum products, liquid fuels, and lubricants (ASTM D02) has created a new standard (soon to be released as D8185) that will serve as a guide for determining how to measure the viscosity of in-service oil.

According to committee members, anyone with a technical background in lubrication or condition monitoring can use this guide to determine options for viscosity testing.

Generally, proper lubrication is important for maximizing the usable life of a machine or device. Viscosity can affect the energy and mass transfer of the lubricant in the machine.

“If the viscosity is too high, it might exceed the pumping capabilities, and lubricant may not be able to reach critical components,” says ASTM International member Norm Kanar, marketing and sales manager at Savant Labs. “If viscosity is too low, the lubricant may not be able to protect the machine from premature wear of components.”

Kanar says that the new standard contains practical, historical, and relevant information on how to measure in-service lubricant viscosity. The guide also provides workers with basic principles of each measurement approach and how to conduct them.

For more information on petroleum products, liquid fuels, and lubricants, please watch this video.

To purchase standards, contact ASTM International customer relations at

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