v, and v, can be found by solving these equations respect to interchange of indices. If you have the viscosity in centiPoise, divide the centiPoise value by the oil's viscosity to get centiStokes. mole fraction in the calculation of the viscosity of the mixture. This calculator uses centiStokes (cSt), which are equivalent to mm^2/s. 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. 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 lower the VI, the more the viscosity is affected by changes in temperature. It is mostly used to characterize the viscosity-temperature behavior of lubricating oils. The degree to which the viscosity decreases determines the Viscosity Index (VI). The viscosity index ( VI) is an arbitrary, unit-less measure of a fluid's change in viscosity relative to temperature change. more CCS viscosity of group I base oils The CCS viscosity of a base stock at a given temperature knowing its viscosity at 100C. This calculator will tell you the viscosity index of. more Base oil mixtures Calculate viscosity or ratio of oils needed to achieve a viscosity. Viscosity changes with temperature, and Viscosity Index (VI) tells you how much.

The viscosity of an oil decreases as temperature increases. Oil viscosity index Calculate kinematic viscosity and/or the viscosity index of a formulation.

Viscosity Index and what you need to know

Viscosity index calculator