MIL-PRF-23699 Lubricating Oil, Aircraft Turbine Engine, Synthetic Base, NATO Code Number O-156

This specification covers three classes of gas synthetic 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 MIL-PRF-23699 specification aircraft oil is identified by NATO Code Number 0-156.