What type of synthetic oil is utilized in gas turbine engines?

In gas turbine engines, the type of synthetic oil commonly utilized is designated as 23699. This oil has been specifically formulated to meet the high-temperature and high-performance demands of gas-turbine applications. Its properties, such as thermal stability, low volatility, and good lubricating capabilities, are crucial for the optimal operation of turbine engines, which often operate under extreme conditions.

This oil type is not only designed to withstand high temperatures but also supports the reduction of wear on engine components and helps in the efficient functioning of the engine over extended periods. Other options listed may relate to different applications or specifications that do not align with the stringent requirements set for synthetic oils used in gas turbine engines.