Question to the Department for Transport:

To ask His Majesty's Government what steps they have taken to qualify and expedite the introduction of the new turbine engine oil MIL-PRF-23699, developed by NYCO and approved by the Society of Automotive Engineers, for engines used in commercial aviation.

The process of qualifying or expediting the introduction of a new engine oil is the role of the engine manufacturers who work with engine oil manufacturers to develop specifications that provide the right combination of constituents to meet their environmental, emissions, performance, reliability and maintenance targets.