Engine Oil Deterioration based on the Viscosity, flash point and fire point for Different Trip Length

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Dana Kareem Hameed


Fresh engine oils or engine lubricants lose some of their properties during service, engine lubricant deterioration leads to change in oil properties, which ultimately have effect on engine overall performance.  Therefore, it is very important to characterize used engine lubricants at different using conditions to check the performance and ability of existing oils, which in turn protects engine parts and also designs new formulations to produce better type of engine oil or improve the existing oil. Therefore, optimizing engine oil lubricant changing time is very important for reducing environmental impact but renewing engine lubricant before it is due rises a customer’s cost. In this study, the most significant parameters such as kinematic viscosity, flash point and fire point were chosen to determine the changes and deterioration in engine oil properties. The oil samples were multigrade fully synthetic with SAE gradation 10W-30 grand ecodrive is used in 5 different passenger cars. Having information about these properties are crucial chemical and physical behaviours of engine oils and for keeping engine’s lifecycle. The test results of this work show that after 10,000 km, 10W-30 Delta NL motor oil brand (special synthetic with API SL) oil properties such as kinematic viscosity at cold start, 40 °C and 100 °C decreased 22.92%, 23.61% and 22.92% respectively. In addition, both flash point and fire point decreased 15.6% and 14.22% consecutively for the base properties, and according to the test results this type of engine oil is suitable to use for 10,000 km.


kinematic viscosity, oil quality, flash point, lubricating system, fire point, late oil draining, brand oil.


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[1] A. Tripathi and R. Vinu, “Characterization of Thermal Stability of Synthetic and Semi-Synthetic Engine Oils,” Lubricants, vol. 3, no. 1, pp. 54–79, Mar. 2015.
[2] T. V. Liston, “Engine lubricant additives: what they are and how they function?,” Lubr. Eng., vol. 48, no. 5, pp. 389–397, 1992.
[3] S. M. Hsu, R. Munro, and M. C. Shen, “Wear in boundary lubrication,” Proc. Inst. Mech. Eng. Part J J. Eng. Tribol., vol. 216, no. 6, pp. 427–441, 2002.
[4] F. Owrang, H. Mattsson, J. Olsson, and J. Pedersen, “Investigation of oxidation of a mineral and a synthetic engine oil,” Thermochim. Acta, vol. 413, no. 1–2, pp. 241–248, 2004.
[5] P. M. Crnkovic, C. R. M. Leiva, A. M. dos Santos, and F. E. Milioli, “Kinetic study of the oxidative degradation of brazilian fuel oils,” Energy Fuels, vol. 21, no. 6, pp. 3415–3419, 2007.
[6] K. T. Sutar and P. U. Singare, “Study of antioxidant activity of hindered phenols in bulk oil and thin film oxidation conditions in Lubricants,” Rasayan J. Chem., vol. 11, no. 2, pp. 465–474, 2018.
[7] B. Jakoby, M. Scherer, M. Buskies, and H. Eisenschmid, “An automotive engine oil viscosity sensor,” IEEE Sens. J., vol. 3, no. 5, pp. 562–568, 2003.
[8] T. Mang and W. Dresel, Lubricants and lubrication. John Wiley & Sons, 2007.
[9] G. Pereira et al., “Chemical and mechanical analysis of tribofilms from fully formulated oils Part 1 – Films on 52100 steel,” Tribology, vol. 1, no. 1, pp. 48–61, 2007.
[10] V. Kumbár and J. Votava, “Excessive additive effect on engine oil viscosity,” Acta Univ. Agric. Silvic. Mendelianae Brun., vol. 62, no. 5, pp. 1015–1020, 2014.
[11] J. P. Coates and L. C. Setti, “Infrared spectroscopic methods for the study of lubricant oxidation products,” ASLE Trans., vol. 29, no. 3, pp. 394–401, 1986.
[12] H. Kaleli and I. Yavasliol, “Oil ageing - Drain period in a petrol engine,” Ind. Lubr. Tribol., vol. 49, no. 3, pp. 120–126, 1997.
[13] D. K. Hameed and K. R. Ali, “Analysis of 0w-20 Totachi brand oil deterioration,” UKH J. Soc. Sci., 2020.
[14] A. N. Farhana and M. Z. Bahak, “Engine oil resistance,” J. Tribol., vol. 4, no. 2015, pp. 10–20, 2015.
[15] G. L. N. Rao, A. S. Ramadhas, N. Nallusamy, and P. Sakthivel, “Relationships among the physical properties of biodiesel and engine fuel system design requirement,” Int. J. Energy Environ., vol. 1, no. 5, pp. 919–926, 2010.
[16] K. S. Shri, K. K. Mohan, H. M. Sakeer, P. D. Deepa, and K. Saravanan, “Studies on Reuse of Re-Refined Used Automotive Lubricating Oil,” Res. J. Eng. Sci., vol. 3, no. 6, pp. 8–14, 2014.
[17] D. Ljubas, H. Krpan, and I. Matanović, “Influence of engine oils dilution by fuels on their viscosity, flash point and fire point,” Nafta, vol. 61, no. 2, pp. 73–79, 2010.