Acta Univ. Agric. Silvic. Mendelianae Brun. 2017, 65(2), 481-490 | DOI: 10.11118/actaun201765020481

Definition of a Motor Oil Change Interval for High-Volume Diesel Engines Based on its Current Characteristics Assessment

Marie Sejkorová1, Ivana Hurtová1, Josef Glos2, Jan Pokorný3
1 Department of Transport Means and Diagnostics, Jan Perner Transport Faculty, University of Pardubice, Studentská 95, 532 10 Pardubice, Czech Republic
2 Department of Combat and Special Vehicles, Faculty of Military Technology, University of Defence, Kounicova 65, 662 10 Brno, Czech Republic
3 Educational and Research Centre in Transport, Jan Perner Transport Faculty, University of Pardubice, Doubravice 41, 532 10 Pardubice, Czech Republic

Evaluation of motor oils is given a big attention due to a fact that during the years it was proven that lubrication is a key factor influencing a service life of vehicles and industrial engines. Motor oil must fully serve in various operational conditions (such as city traffic with frequent braking and acceleration) as well as in different climatic conditions (arctic winters or tropical summer heat). Therefore, the change of the motor oil should be optimized in order to ensure proper engine efficiency and extend its service life.
The article presents result of testing of two types of used motor oils with the same specification ACEA E4/E7, SAE 10W-40, from two different suppliers. These oils were used in a high-volume diesel engine of IVECO CITY BUS. The sales representatives recently offered a more expensive motor oil (in the text marked oil B) claimed that in their oil can extend the change interval from 40,000 km to 80,000 km.
Evaluation of selected parameters did not prove that after exceeding of change interval 40,000 km, the more expensive motor oil would ensure all required functions as it had been declared by the supplier's sales representative.

Keywords: motor oil, change interval, lubricant analysis, lubricant quality, degradation, FTIR spectrometry, emission spectrometry, particles analysis, measurement
Grants and funding:

The research has been supported by the project SGS_2016_008. The authors thank University of Pardubice for financial support.

Prepublished online: April 30, 2017; Published: May 1, 2017  Show citation

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Sejkorová, M., Hurtová, I., Glos, J., & Pokorný, J. (2017). Definition of a Motor Oil Change Interval for High-Volume Diesel Engines Based on its Current Characteristics Assessment. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis65(2), 481-490. doi: 10.11118/actaun201765020481
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