Determination of the Density and Viscosity of Engine Oil with Grade 20w-50 in Nigeria
Keywords:
Engine oil, Density, Viscosity and TemperatureAbstract
Oil plays a role in the moving parts of an engine. It reduces friction and minimizes the wear and tear of the engine parts. The thermo-physical properties considered are the density and viscosity of the oil samples. . Viscosity is thick, sticky, and semi-fluid due to internal friction. Viscosity is a measure of a fluid’s resistance to flow. Oil samples from five companies with a grade of 20w-50 were tested for viscosity between 20 and 100 which indicate the maximum temperature rating according to manufacturers’ specification. The results obtained for the giventemperature range were Mobil engine oil (2.56 to 0.67)Pa.s, Total engine oil (0.54 to 0.22)Pa.s, A-Z engine oil (1.55 to 0.41)Pa.s, Sea Horse engine oil (1.35 to 0.35)Pa.s, and Oando engine oil (1.21 to 0.35)Pa.s. These results show that the viscosity decreases as temperature increases. Similarly, the density of each oil sample subjected to the same temperature check range had the following: Mobil engine oil (0.856 to 0.799)kg , Total engine oil (0.826 to 0.765)kg A-Z engine oil (0.865 to 0.784)kg , Sea Horse engine oil (0.872 to 0.774)kg Oando engine oil (0.879 to 0.799)kg Having seen that at high temperature only Mobil oil has the maximum value of viscosity, it can therefore be considered the most preferred amongst the five oil samples.
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