| Viscosity Index |
Articles about Viscosity |
Information AboutViscosity Index |
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The VI scale was set up by the Society Of Automotive Engineers (SAE) The temperatures chosen arbitrarily for reference are 100 ° Fahrenheit (40 ° C ) and 210 °F (100 °C). The original scale only stretched between VI=0 (worst oil) and VI=100 (best oil) but since the conception of the scale better oils have also been produced. The worst oils at the time of setting up of the quality indicator were those derived from oils of the American Gulf Coast and the best from Pennsylvanian crude oils. VI improver additives and higher quality base oils are widely used nowadays which increase VI beyond the value of 100. Viscosity index of the synthetic fluids range between 80 to 400. Articles about Viscosity Index
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