# Noack volatility test

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Test to determine evaporation loss of lubricants in high-temperature service

The **Noack volatility test**, named after Kurt Noack,[1] determines the [evaporation](/source/Evaporation) loss of [lubricants](/source/Lubricants) in high-temperature service. This test is standardized as **ASTM D5800**.[2]

In this test, a sample is heated at 250 °C for 60 minutes with a constant flow of air over it. The weight fraction lost is the result for the Noack volatility test.

As the lighter hydrocarbon fraction of motor oils evaporate, the viscosity of the remaining oil increases, contributing to poor circulation, reduced [fuel economy](/source/Fuel_economy_in_automobiles), increased oil consumption, wear and [tailpipe emissions](/source/Tailpipe_emissions).

## References

1. **[^](#cite_ref-1)** K. Noack (1936). "Eine neue Laboratoriumsmethode zur Ermittlung der Verdampfbarkeit von Schmierölen für Verbrennungskraftmaschinen". *Angew. Chem*. **49** (25): 385–388. [Bibcode](/source/Bibcode_(identifier)):[1936AngCh..49..385N](https://ui.adsabs.harvard.edu/abs/1936AngCh..49..385N). [doi](/source/Doi_(identifier)):[10.1002/ange.19360492504](https://doi.org/10.1002%2Fange.19360492504).

1. **[^](#cite_ref-2)** [*ASTM D5800-15a, Standard Test Method for Evaporation Loss of Lubricating Oils by the Noack Method*](https://www.astm.org/Standards/D5800.htm) (Technical report). West Conshohocken, PA: ASTM International. 2015. [doi](/source/Doi_(identifier)):[10.1520/D5800-15A](https://doi.org/10.1520%2FD5800-15A).

v t e ASTM Standards Selected standards A ASTM A53 ASTM A325 ASTM A354 ASTM A490 ASTM A500 ASTM A992 C ASTM C131 ASTM C535 D ASTM D5800 E ASTM E1714 F ASTM F568M ASTM F883 Related ASTM International Award of Merit Charles Benjamin Dudley ASTM Subcommittee E20.02 on Radiation Thermometry

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