MIL-PRF-23699F, PERFORMANCE SPECIFICATION: LUBRICATING OIL, AIRCRAFT TURBINE ENGINE, SYNTHETIC BASE, NATO CODE NUMBER O-156 (21 MAY 1997) [SUPERSEDING

MIL-PRF-23699F, PERFORMANCE SPECIFICATION: LUBRICATING OIL, AIRCRAFT TURBINE ENGINE, SYNTHETIC BASE, NATO CODE NUMBER O-156 (21 MAY 1997) [SUPERSEDING MIL-L-23699E]., This specification covers three classes of gas turbine engine lubricating oils, primarily used for aircraft engines, which have a nominal viscosity of 5 centistokes at 100 Deg. C and which are typically made with neopentyl polyol ester base stocks. This oil is identified by NATO Code Number 0-156.