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Dependence of thermal stability of an engine lubricating oil on usage period
Date
1999-01-01
Author
Karacan, Ö.
Kök, Mustafa Verşan
Karaaslan, U.
Metadata
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This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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Mineral oil type lubricating oils have an important role in reducing engine wear. But after some period, depending on the oil quality, oil replacement is needed since the oil loses its properties. In this paper, an engine oil was tested in a 1300 cc engine car and the change of the thermal stability of the collected portions of oil at different usage periods were experimented by TG/DTG and DSC techniques. Results show that, as usage period increases lubricating oil contains more of the light components that distill at low temperatures. The increase in tine peak maximum temperature, T-max, of the DTG, as usage period increases, proposes that the molecular mass of the oil increase, which presumably changes the viscosity characteristics. Moreover as the usage period increases some residue type components, which only can be destroyed at very high temperatures, are produced in oil phase.
Subject Keywords
Thermogravimetry
,
Mineral oil
,
Differential scanning calorimeter
URI
https://hdl.handle.net/11511/35900
Journal
Journal of Thermal Analysis and Calorimetry
DOI
https://doi.org/10.1023/a:1010136222719
Collections
Department of Petroleum and Natural Gas Engineering, Article