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ISO 2909:2002

Petroleum products — Calculation of viscosity index from kinematic viscosity

Dec 12, 2002

General information

90.20     Jul 15, 2025

ISO

ISO/TC 28

International Standard

75.080  

English   French  

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Scope

ISO 2909:2002 describes two procedures for calculating the viscosity index (VI) of petroleum products and related materials, such as lubricating oils, from their kinematic viscosities at 40 °C and 100 °C.
Procedure A is applicable to petroleum products of viscosity index up to and including 100.
Procedure B is applicable to petroleum products of viscosity index 100 or greater.
ISO 2909:2002 does not apply to petroleum products with kinematic viscosities less than 2,0 mm2/s at 100 °C. It applies to petroleum products with kinematic viscosities between 2 mm2/s and 70 mm2/s at 100 °C. Equations are provided for calculating the viscosity index of petroleum products having kinematic viscosities above 70 mm2/s at 100 °C.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 2909:1981

NOW

PUBLISHED
ISO 2909:2002
90.20 Standard under periodical review
Jul 15, 2025

National adoptions

SRPS ISO 2909:2007  
ISS

Petroleum products — Calculation of viscosity index from kinematic viscosity

90.20   Standard under periodical review

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