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QUALIFIED PRODUCT LIST OF PRODUCTS QUALIFIED UNDER PERFORMANCE SPECIFICATION MIL-PRF-23699 Lubricating Oil, Aircraft Turbine Engine, Synthetic Base, NATO Code Numbers: O-152, O-154, O-156, and O-167

This QPL has been prepared for use by or for the Government in the acquisition of products covered by the subject specification and inclusion of a product is not intended to and does not connote endorsement of the product by the Department of Defense. All products included herein have been qualified under the requirements for the products as specified in the latest effective issue of the applicable specification. This QPL is updated as necessary and is subject to change without notice. Inclusion of a product does not release or otherwise affect the obligation of the manufacturer to comply with the specification requirements.

THE ACTIVITY RESPONSIBLE FOR THIS QUALIFIED PRODUCTS LIST IS THE NAVAL AIR SYSTEMS COMMAND (ATTENTION: COMMANDER, NAVAL AIR WARFARE CENTER AIRCRAFT DIVISION, CODE 4L8000B120-3, HIGHWAY 547, LAKEHURST, NJ 08733-5100).

THE ACTIVITY RESPONSIBLE FOR QUALIFICATION APPROVAL IS THE NAVAL AIR SYSTEMS COMMAND, AIR 4.4.5, BUILDING 2360, 22229 ELMER ROAD, UNIT 4, PATUXENT RIVER, MD 20670-1534.Three types of oils are available under the following classifications:

Classification NATO Code Type of Oil

STD O-156 Standard (Non-Corrosion Inhibiting)

C/I O-156/O-152 Corrosion Inhibiting

HTS O-156/O-154 High Thermal Stability

STD, C/I and HTS oils are fully interchangeable and can be mixed together in the same engine. However, C/I oils provide increased corrosion protection to engine bearings and components, while HTS oils provide added thermal protection and reduced deposition. Mixing of oils will diminish the desired feature and it will perform at the STD level. The U.S. Military has converted to the use of the C/I oil in order to take advantage of the increased protection afforded by this class of oil for normal use. The HTS oil is available for special applications if needed. STD oils will be acceptable for use in emergency situations, including top off of engines containing C/I or HTS oil, and international crossservicing.