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ISO 4263-4:2006

Petroleum and related products — Determination of the ageing behaviour of inhibited oils and fluids — TOST test — Part 4: Procedure for industrial gear oils ISO 4263-4:2006

Publication date:   Jan 27, 2006

General information

90.93   Standard confirmed   Mar 5, 2026

ISO

ISO/TC 28 Petroleum and related products, fuels and lubricants from natural or synthetic sources

International Standard

75.100   Lubricants, industrial oils and related products

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Scope

ISO 4263:2006 specifies a method for the determination of the ageing behaviour of gear oils of categories CKC, CKD, CKS and CKT as defined in ISO 6743-6. The ageing is accelerated by the presence of air and elevated temperatures, and the degradation of the oil is assessed by the change in kinematic viscosity at 100 °C, the insoluble content (precipitation number), and possibly the acid number increase, the sediment content by filtration, the additives content variation and the infra-red oxidation.

Life cycle

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PUBLISHED
ISO 4263-4:2006
90.93 Standard confirmed
Mar 5, 2026




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