Fuel and Lubricant Testing


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FTM 203 - Pour Stability of Lubricating Oils (Stable Cloud Point)

We perform lubricants quality testing by FTM 203 to measure the pour stability of lubricating oils, power transmission fluids, and hydraulic oils. This test for pour stability is primarily intended for use with engine lubrication oils. However, by establishing proper final cooling temperatures, this method can be used for other lubricating oils such as power transmission fluids and hydraulic oils.

A sample of fluid is exposed to a 7 day temperature cycle.  The oil is cooled from 15°C to -23°C in 17 hours, warmed to 0°C in 43 hours, then cooled very slowly (at approximately 2°C/hour) to the oil pour point. The "stable pour point" is defined as the temperature 3°C above the solidification temperature.

We also perform cloud point testing by ASTM D2500ASTM D5771ASTM D5773DIN 51597FTM 202IP 444IP 446ISO 3015MIL-DTL-17111 §, and MIL-H-22072 §4.6.7. These different test methods use different instruments or procedures or are used for certain sample types. Click on the test method number to learn more about each test.

Contact us today to receive a quote for your lubricants testing.

To learn more about this test method, read or download FED-STD-791D.