viscosity index available for lubricant oil explaining the quality of lubricant oil . Likewise any possibilities for viscosity index of edible oil relate quality of edible oil
Based on the rheograms (plot of mean shear stress against shear rate), all of the vegetable oils studied were found to be Newtonian fluids. Rice bran oil was the most viscous (0.0398 Pa·s at 38°C) while walnut oil was the least viscous (0.0296 Pa·s at 38°C) among the oils studied.