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RS ISO 8068: 2024
Lubricants, industrial oils and related products (class L) — Family T (Turbines) — Specifications for lubricating oils for turbines

Abstract

This document specifies the minimum requirements for lubricants for turbines, as delivered. It is intended
to be used in conjunction with ISO 6743-5.
This document specifies the requirements for a wide variety of lubricants for the lubrication of most types of
turbines for power generation, including steam turbines, gas turbines, single shaft combined cycle turbines
with common lubrication system and hydraulic turbines. This document does not specify the requirements
for lubricants for wind turbines, which are covered in ISO 12925-1.
The following lubricants are considered:
— mineral oils, of either API groups I, II, II+, III, including group III from GTL (gas to liquid) process, and III+.
Some API groups II and III are suitable for high temperature gas turbines;
— synthetic lubricants, esters (API group V) and polyalphaolefins (API group IV), intended for high
temperature gas turbines;
— synthetic lubricants, esters (API group V) and polyalphaolefins (API group IV), environmentally
acceptable for use in hydraulic turbines;
— fire resistant phosphate-ester type lubricants.

General Information

Code	Classification	Theme	Pages	Publisher	Availability
RS ISO 8068: 2024	ADOPTED ISO STANDARDS	Petroleum and related technologies	27	Third Edition Jul 2026	Available