![]() ![]() If you have the viscosity in centiPoise, divide the centiPoise value by the oil's viscosity to get centiStokes. It is an empirically derived, unitless number. Equivalent viscosities for 100 & 210F are shown SAE 90 to 250 and 20 to 50 specified at 100C. The viscosity index was developed for this purpose (ASTM D2270) by E. ISO are specified at 40C AGMA are specified at 40C SAE 75w, 80w, 85, 5w, & 10w specified at low temperature. ![]() This calculator uses centiStokes (cSt), which are equivalent to mm^2/s. Viscosities based on 96 VI single grade oils. Solutions for Chapter 1Problem 23MCQ: Viscosity index of a mineral oil can be improved by(a) Removing aromatics (low VI) during refining stage(b) Blending with. Higher quality oils tend to have higher viscosity indices, and while there are ranges in every category, a synthetic oil will tend to have a much higher viscosity index than its conventional counterpart. Product SDS Sheet Mineral Oil Light Viscosity From Wikipedia, the free encyclopedia Mineral oil or liquid petrolatum is a by-product in the distillation of petroleum to produce gasoline. If you know the viscosity of your oil at 40✬ and 100✬ (100✯ and 212✯) you can easily calculate its Viscosity Index. Oil needs to flow when cold, but not get too thin and runny when it's warm. That is, oil with a high VI will retain their viscosity over a wider temperature range and work as designed in both hot and cold environments.Ī higher VI is important when your machine will experience a big change in operating temperatures. The higher the viscosity index, the lower the change in viscosity. The degree to which the viscosity decreases determines the Viscosity Index (VI). Depending on the oil you’re shopping for, you may notice a single number like SAE 30, which are single grade or straight weight oils. Performance Specifications KINEMATIC VISCOSITY CST 100C 7.27, 11.7, 15.8, 20.4 VISCOSITY INDEX, 110, 100, 95, 93 FLASH POINT, C 210, 227, 228, 229. The viscosity of an oil decreases as temperature increases. Viscosity Index and what you need to know ![]()
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