IJST volume 13, issue 3, P352-359 2020 DOI: 10.17485/ijst/2020/v13i03/147759 View full text
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Ioana Stanciu

Abstract: Objectives: To study the viscosity index for oil used as biodegradable lubricant using tree methods. Methods: Viscosity index for oil used as biodegradable lubricant (coconut oil, soybean oil, corn oil, rapeseed oil) was determined using a set of Schott Ubbelohde-type viscometers selected according to the values of their constants, so that the margins of the uncertainty, inherent in the Hagebach-Couette correction, does not exceed the error allowed for the measurements. The measurements were carried out at 40 …

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