ISO 4263-1:2003

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Petroleum and related products — Determination of the ageing behaviour of inhibited oils and fluids — TOST test — Part 1: Procedure for mineral oils

ISO 4263-1:2003 refers to an international standard that outlines a test method to determine the aging behavior of inhibited mineral oils, commonly used in applications like turbine oils, hydraulic fluids, and circulating oils, by measuring their oxidation stability under controlled conditions, often called the "TOST test" (Test of Oxidation Stability) - specifically focusing on the procedure for mineral oils in Part 1 of the standard.