Lube-Tech
indicative of poor performance. The lower observed limit indicates reduced oil consumption and minimal emissions, and it keeps engine valves free from debris and accelerated wear. The NOACK method allows for specific volatility measurement in modern low-viscosity oil developments.
Figure 2: Volatility, mass % loss, 1 hour, @ 250 °C (ASTM D5800), adapted from [24]
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No.150 page 5
3.5 NOACK (D5800) Instrumentation In order to perform the NOACK test more efficiently, the Koehler Instrument Company has introduced a variant of the NOACK apparatus that conforms to ASTM D5800. Figure 4 below shows a schematic diagram of the device directly from the standardised testing method.
Figure 4: Schematic of Automatic Non-Woods Metal Noack Evaporation Apparatus [26]
Figure 3: Oil Volatility Measurements of Leading Synthetic Oil Brands, adapted from [25]
Nonetheless, the lower percent volatility loss, as indicated by the NOACK limit, is more favorable and indicative of resistance to oil volatility and thermal breakdown, helping improve the efficiency of ICE vehicles. Furthermore, the versatility of NOACK measurements for modern-low viscosity oil developments commercially helps the industry as it allows a variety of developers to create their own NOACK device standardised with ASTM D5800.
Koehler Instrument company’s Automatic Non-Woods Metal NOACK Evaporation apparatus can be used to determine engine oil volatility. This is necessary for high-temperature environments, which contribute to increased consumption and property modifications of engine oil. The standard test method is consistent – oil samples are placed in an evaporation crucible, which can then be heated to 245.2 °C for an hour. This allows for percent evaporation loss determination. The Noack apparatus is highly digitised and equipped with an electronic regulator that allows for automatic temperature and differential pressure control. With meticulous design and functionality, this state-of- the-art apparatus offers a comprehensive solution to the matter of volatility, allowing for the examination of various substances used in vehicles, particularly lubricating oils.
Conclusion
Understanding the development of oil viscosity and volatility is crucial for various aspects of the oil industry. The historical trajectory of oil affects different
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