[Booser, E.R. (1997). Tribology data handbook: an excellent friction, lubrication, and wear resource. CRC Press, New York, USA.]Search in Google Scholar
[Chmielewski, Z. (2017). Stany niezawodnościowe oleju silnikowego w eksploatacji. Autobusy: technika, eksploatacja, systemy transportowe, 18, 761-764.]Search in Google Scholar
[Dostál, P., Rozlivka, J., Kumbár, V. (2019). Operational degradation of engine oil in agricultural technology. Acta Technologica Agriculturae, 22(1), 17-21.10.2478/ata-2019-0004]Search in Google Scholar
[Gołębiowski, W., Wolak, A., Zając, G. (2018a). Definition of oil change intervals based on the analysis of selected physicochemical properties of used engine oils. Combustion Engines, 57, 44-50.10.19206/CE-2018-105]Search in Google Scholar
[Gołębiowski, W., Zając, G., Wolak, A. (2018b). Contents of metals in engine oils from agricultural tractors. Przemysł Chemiczny, 97, 696-699.]Search in Google Scholar
[Gołębiowski, W., Zając, G., Wolak, A. (2019a). Analysis of engine oils from farm tractors in the aspect of their change. Agricultural Engineering, 23(1), 25-38.10.1515/agriceng-2019-0003]Search in Google Scholar
[Gołębiowski, W., Wolak, A., Zając, G. (2019b). The influence of the presence of a diesel particulate filter (DPF) on the physical and chemical properties as well as the degree of concentration of trace elements in used engine oils. Petroleum Science and Technology, 37(7), 746-755.10.1080/10916466.2018.1539751]Search in Google Scholar
[Holloway, M. (2007). The Oil Analysis Handbook: A Comprehensive Guide to Using and Understanding Oil Analysis. NCH Corporation: Irving, TX, USA.]Search in Google Scholar
[Krupowies, J. (2007). Analiza zmian właściwości olejów smarowych użytkowanych w przekładni napędu głównego statków. Problemy Eksploatacji, 4, 175-187.]Search in Google Scholar
[Ljubas, D., Krpan, H., Matanović, I. (2010). Influence of engine oils dilution by fuels on their viscosity, flash point and fire point. Nafta: Exploration, Production, Processing, Petrochemistry, 61(2), 73-79.]Search in Google Scholar
[Malinowska, M. (2014). Analiza zanieczyszczeń oleju silnikowego stosowanego w silniku Cegielski-Sulzer 3AL25/30. Zeszyty Naukowe Akademii Morskiej w Gdyni, 83, 194-202.]Search in Google Scholar
[Raposo, H., Farinha, J.T., Fonseca, I., Ferreira, L.A. (2019). Condition Monitoring with Prediction Based on Diesel Engine Oil Analysis: A Case Study for Urban Buses. Actuators 8, 14.10.3390/act8010014]Search in Google Scholar
[ASTM International. Standard practice for condition monitoring of in-service lubricants by trend analysis using Fourier transform infrared (FT-IR) spectrometry. ASTM International; 2010. New York: American Society for Testing and Materials.]Search in Google Scholar
[ASTM International. (2017). D7094-17a, Standard Test Method for Flash Point by Modified Continuously Closed Cup (MCCCFP) Tester, West Conshohocken, PA.]Search in Google Scholar
[Stępień, Z., Urzędowska, W., Oleksiak, S., Czerwiński, J., Andersen, O. (2011). Oddziaływanie olejów napędowych zawierających FAME na procesy degradacji smarowych olejów silnikowych i wielkość emisji cząstek stałych. Nafta-Gaz, 67(4), 272-281.]Search in Google Scholar
[Urzędowska, W., Stępień, Z. (2012). Wybrane zagadnienia dotyczące zmian właściwości silnikowego oleju smarowego w eksploatacji. Nafta-Gaz, 12(LX), 1102-1110.]Search in Google Scholar
[Wolak, A., Zając, G., Gołębiowski, W. (2019). Determination of the content of metals in used lubricating oils using AAS. Petroleum Science and Technology, 37(1), 93-102.10.1080/10916466.2018.1511584]Search in Google Scholar
[Wolak, A., Zając, G., & Żółty, M. (2018). Changes of properties of engine oils diluted with diesel oil under real operating conditions. Combustion Engines, 57.10.19206/CE-2018-206]Search in Google Scholar
[Zając, G., Szyszlak-Bargłowicz, J., Słowik, T., Kuranc, A., Kamińska, A. (2015). Designation of chosen heavy metals in used engine oils using the XRF method. Polish Journal of Environmental Studies, 24(5), 2277-2283.10.15244/pjoes/58781]Search in Google Scholar
[Zhi-Na, X., Jiu-Xiang, W., Jun, Q. (2012). Rapid Measurement of Diesel Engine Oil Quality By Near Infrared Spectroscopy (NIRS). The Open Petroleum Engineering Journal, 5(1), 58-62.10.2174/1874834101205010058]Search in Google Scholar