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RS ISO 13357-1: 2025
Petroleum products — Determination of the filterability of lubricating oils — Part 1: Procedure for oils in the presence of water

Abstract

This document specifies a procedure for the evaluation of the filterability of lubricating oils in the presence
of water. The procedure only applies to mineral-based oils, since fluids manufactured from other materials
(e.g. fire-resistant fluids) can be incompatible with the specified test membranes. This document is applicable
to oils of viscosity up to ISO viscosity grade (VG) 100, as defined in ISO 3448. Within the range described,
the variation in filterability due to viscosity is included within the precision range of this document. The
procedure is not suitable for some hydraulic oils on which specific properties are conferred by the use of
insoluble or partially soluble additives, or by particularly large molecular species. These additives include
some viscosity index modifiers and some friction modifying additives.
This document can also be applied to oils of ISO viscosity grades (VG) 150, 220 and 320, as defined in
ISO 3448, using the specified 3,0 ?m rated membranes. These oils are widely used as heavy-duty lubricants
in equipment such as paper making machines and rolling mills. Within the range described, the filterability
as defined is not dependent on the viscosity of the oil.

General Information

Code	Classification	Theme	Pages	Publisher	Availability
RS ISO 13357-1: 2025	ADOPTED ISO STANDARDS	Petroleum and related technologies	23	Third Edition Jul 2026	Available