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Assessment of oil change intervals in urban buses based on the selected physicochemical properties of used engine oils

Gołębiowski Wojciech, Zając Grzegorz, Sejkorová Marie, Wolak Artur

Combustion Engines

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2024

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R. 63, nr 1

15--23

EN

The paper presents the results of the analysis of selected physicochemical parameters of engine oils after their use. The oils were obtained both from urban buses belonging to the fleet of a municipal transport company in Lublin, Poland but also from the city of Pardubice in the Czech Republic. Five samples of 10W40 semi-synthetic oil and four samples of 5W30 synthetic oil were tested. Kinematic viscosity at 40°C and 100°C, oxidation, nitration, sulfonation, total acid number (TAN), total base number (TBN), remaining antiwear additives, water content and glycol content, were assessed using infrared spectroscopy (FTIR). The tests were performed on the basis of the ASTM E2412-10 standard. The article also presents the exceedance of the limit values results for the selected parameters. The results of the research can be used in optimizing the engine oil change interval so that the decision to replace the oil is justified both in economic and technical terms, taking into account the need to maintain the service life of the bus.

2

Analiza rynku pozyskania olejów przepracowanych z ciągników rolniczych w aspekcie ochrony środowiska przyrodniczego

Juściński S.

Przemysł Chemiczny

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2018

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T. 97, nr 1

77--82

PL

Zużyty olej silnikowy jest odpadem niebezpiecznym i dlatego wymaga specjalnych reguł postępowania w zakresie pozyskiwania, gromadzenia, przechowywania i zagospodarowania. W badaniach weryfikowano poziom popytu i jego zmiany dla 3462 zleceń wymiany olejów w odniesieniu do 1731 ciągników rolniczych. Dla ciągników w okresie gwarancyjnym zlecono wykonanie prawie 400% więcej usług wymiany oleju niż dla ciągników po zakończeniu gwarancji. Tylko 30,5% olejów przepracowanych podlega zagospodarowaniu zgodnie z wymaganiami ustawy o ochronie środowiska. W miesiącach zimowych następowało istotne zmniejszenie ilości pozyskiwanych zużytych olejów w autoryzowanych stacjach obsługi.

EN

The delivery of waste oil by tractor owners to 3 authorized service stations located in central Poland in relation to the no. of tractors in 2003-2014 was analyzed. During the tractor warranty period, the oil changes were often ordered. Only 30.5% of the used oils was recycled in accordance with regulations. A significant redn. of the amt. of used oils delivered to the authorized stations was obsd. in winter.

3

Definition of oil change intervals based on the analysis of selected physicochemical properties of used engine oils

Gołębiowski W., Wolak A., Zając G.

Combustion Engines

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2018

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R. 57, nr 1

44--50

EN

The paper presents the results of a thorough analysis of selected physicochemical parameters of engine oils at the end of their useful life, based on the oil change intervals assumed by vehicle users. Twelve samples of used Castrol Edge 5W/30 synthetic oil and five samples of used Castrol Magnatec 10W/40 semi-synthetic oil were tested. The Eralytics's ERASPEC OIL device was used for the assessment of the following parameters: degree of oxidation, degree of nitration, degree of sulfonation, water content, glycol content, total base number (TBN), total acid number (TAN) and kinematic viscosity at 40°C and 100°C. The research was conducted on the basis of the ASTM E2412-10 standard. The results regarding the parameter limit exceedances have also been presented in the paper. For both synthetic and semi-synthetic oils, the exceedance of kinematic viscosity measured at 40°C was particularly striking. In fourteen samples (out of seventeen tested), at least one exceedance of the limit value (out of nine analyzed) has been observed.

4

Resurs silnika spalinowego do wymiany oleju – jak go określić?

Chmielewski Z.

TTS Technika Transportu Szynowego

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2012

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R. 19, nr 9

1809--1816, CD

PL

W artykule omówiono zagadnienie wyznaczania resursu silnika spalinowego do wymiany oleju. Techniczny warunek wymiany oleju silnikowego poszerzono o aspekt ekonomiczny prowadzonego procesu. Wskazano na straty ekonomiczne wynikające z przyjętego przez producentów samochodów systemu wymiany oleju w silniku oraz zaprezentowano kierunki badań w zakresie bieżącej oceny przydatności eksploatowanego oleju jako środka smarowego w silniku spalinowym.

EN

The article discusses the problem of determining of combustion engine resource till oil replacement. The technical aspect of the engine oil change moment was extended by the economic aspect of the ongoing process. Article is showing the economic losses resulting from adopted by motor manufacturers oil replacement system in the engine and presenting research directions in the ongoing assessment of the suitability of exploited oil as a lubricating medium in the combustion engine.