What does the pour point of engine oil mean?

1 Answers
CamilaLynn
07/30/25 5:19am
The pour point of engine oil refers to the lowest temperature at which the lubricating oil can still flow under specified test conditions when cooled. Below is relevant information: 1. Definition of freezing point: It is the highest temperature at which the surface of the oil sample no longer moves when cooled under specified test conditions, expressed in °C. 2. Definition of pour point: It is a conventional indicator used to measure the low-temperature fluidity of lubricating oils. The pour point of the same oil is slightly higher than its freezing point by a few degrees. In the past, the freezing point was commonly used, but the pour point is now internationally recognized. 3. Impact of a high pour point or freezing point: The low-temperature fluidity of the oil is poor. Based on the pour point of the oil, appropriate measures can be considered for transportation, storage, and handling under low-temperature conditions, and it can also be used to evaluate the low-temperature performance of certain oils.
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