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MIL-PRF-23699

Revision G, March 13, 2014

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LUBRICATING OIL, AIRCRAFT TURBINE ENGINE, SYNTHETIC BASE, NATO CODE NUMBERS: O-152, O-154, O-156, and O-167



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Description / Abstract:

These lubricating oils are intended for use in gas turbine engines and gear boxes for air, sea, and ground mobility equipment. These oils are designed for operation within the approximate bulk oil temperature range of -40 to 204 ┬░C. The STD class oil is intended for use in normal performance turbo equipment where concerns about ferrous material (gears and bearings) corrosion induced from extended periods of downtime in a moist environment is not a concern. The C/I class oil is intended for applications where corrosion inhibition is desired. The HTS class is for use in hot running engine designs where evidence of oil coking and/or oil degradation is noted. The EE class is intended for applications needing improved fluorocarbon (SAE AMS7276) compatibility as well as better load carrying capability. All the lubricant classifications are not intended for use in gas turbine systems containing silicone and fluorosilicone seals which operate at elevated temperatures. All the lubricant classifications are interchangeable and fully compatible with each other; however, mixing across classifications will diminish the added benefits provided by the C/I, HTS, or EE oils and the mixture will revert to the STD level of performance. Reference NAVAIRINST 10350.4 for more information about application of these oils.