METHODS FOR CALCULATING THE VISCOSITY INDEX HYDRAULIC OIL
The viscosity of hydraulic oil was determined using tree methods ASTM D 2270 and method graphically using ASTM D 341 Viscosity index calculation was performed with a computer program using kinematic viscosity at 40°C and 100°C Viscosity index obtained with the calculator program is 69% lower than that obtained by graphical method and the equation 1 The viscosity temperature
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