Note 1 - The results obtained from the calculation of VI from kinematic viscosities determined at 40 and 100 oC are virtually the same as those obtained from the former VI system using kinematic viscosities determined at 37.78 and 98.89 oC.ġ.1.1 Procedure A - For petroleum products of viscosity index up to and including 100.ġ.1.2 Procedure B - For petroleum products of which the viscosity index is 100 or greater.ġ.2 This standard does not apply to petroleum products with kinematic viscosities less than 2.0 mm 2/s (cSt) at 100 oC. 1.1 This practice covers the procedures for calculating the viscosity index of petroleum products, such as lubricating oils, and related materials from their kinematic viscosities at 40 and 100 oC.
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