D2270

D2270-93(1998)
Standard Practice for Calculating Viscosity Index From Kinematic Viscosity at 40 and 100°C

1.1 This practice specifies 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°C.

1.1.1 Procedure A -For petroleum products of viscosity index up to and including 100.

1.1.2 Procedure B -For petroleum products of which the viscosity index is 100 or greater.

1.2 Table 1 given in this practice applies to petroleum products with kinematic viscosities between 2 and 70 mm /s (cSt) at 100°C. Equations are provided for calculating viscosity index for petroleum products having kinematic viscosities above 70 mm /s (cSt) at 100°C.

1.3 The kinematic viscosity values are determined with reference to a value of 1.0038 mm /s (cSt) at 20.00°C for distilled water. The determination of the kinematic viscosity of a petroleum product shall be carried out in accordance with Test Methods D-445, IP 71, ISO 3104, or ISO 2909.

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