本规范涵盖四类燃气轮机发动机润滑油，主要用于飞机发动机，其在100°C下的标称粘度为5厘斯托克，通常由新戊多元醇酯基础油制成。这种石油由北约代码O-152、O-154、O-156和O-167识别。

This specification covers four classes of gas turbine engine lubricating oils, primarily used for aircraft engines, which have a nominal viscosity of 5 centistokes at 100 å¡C and which are typically made with neopentyl polyol ester base stocks. This oil is identified by NATO Code Numbers O-152, O-154, O-156, and O-167.