# ISO 2909:1981 — Withdrawn and superseded ISO standards

For ISO 2909:1981, item title is Petroleum products — Calculation of viscosity index from kinematic viscosity; status code is 9599; successor is ISO 2909:2002; withdrawn / published date is 1981-09-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 2909:1981 _(verified: appears in the quote below)_
- **Item title:** Petroleum products — Calculation of viscosity index from kinematic viscosity _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 2909:2002
- **Withdrawn / published date:** 1981-09-01 _(verified: appears in the quote below)_

## What the source says

> 7948,IS,,ISO 2909:1981,Petroleum products — Calculation of viscosity index from kinematic viscosity,Produits pétroliers — Calcul de l'indice de viscosité à partir de la viscosité cinématique,1981-09-01,2,['75.080'],ISO/TC 28,9599,,[29953],"['en','fr']",6,"<p>Specifies two procedures at 40 °C and 100 °C. Procedure A is applicable to viscosity indices up to and including 100, procedure B to viscosity indices 100 and greater. The table given applies to kinematic viscosities between 2 and 70 mm /s at 100 C. The values are determined with reference to a value of 1,003 8 mm /s at 20,00 °C for distilled water.</p>"

## Source

- https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified: 2026-08-05. Review by: 2027-02-01.
Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).