Pour Point test (ASTM D-97)

The purpose of the Pour Point test is to help define the lowest operating temperature for an oil. During this relatively simple test, the temperature is slowly reduced and it is noted at what point the fluid becomes too viscous to flow. Some times Pour Point is referred to as Pouring Point.

Here is a screen grab from a Technical Data Sheet showing the Pour Point/Pouring Point for a Polyalphaolefin (PAO) base oil:

This particular base oil as a Pour Point of -65°C

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