Acta Univ. Agric. Silvic. Mendelianae Brun. 2013, 61(6), 1763-1767 | DOI: 10.11118/actaun201361061763

Low-temperature behaviour of the engine oil

Vojtěch Kumbár¹, Artūras Sabaliauskas²

¹ Department of Engineering and Automobile Transport, Mendel University in Brno, Zemědělská 1, 613 00 Brno, Czech Republic

² Department of Mechanical Engineering, Šiauliai University, Republic of Lithuania

The behaviour of engine oil is very important. In this paper has been evaluated temperature dependence kinematic viscosity of engine oils in the low temperatures. Five different commercially distributed engine oils (primarily intended for automobile engines) with viscosity class 0W-40, 5W-40, 10W-40, 15W-40, and 20W-40 have been evaluated. The temperature dependence kinematic viscosity has been observed in the range of temperature from -15 °C to 15 °C (for all oils). Considerable temperature dependence kinematic viscosity was found and demonstrated in case of all samples, which is in accordance with theoretical assumptions and literature data. Mathematical models have been developed and tested. Temperature dependence dynamic viscosity has been modeled using a polynomials 3^rd and 4^th degree. The proposed models can be used for prediction of flow behaviour of oils. With monitoring and evaluating we can prevent technical and economic losses.

Keywords: engine oil, low temperature, kinematic viscosity, density, modeling

Grants and funding:

The research has been supported by the projects IP 22/2012 and the project CZ.1.07/2.3.00/20.0005.

Received: September 16, 2013; Published: November 24, 2013  Show citation