General This SAE Standard describes lubricating oils meeting the physical@ chemical and performance requirements of American Petroleum Institute (API) performance categories CF and CF-2@ CI-4@ supplement CI-4 PLUS@ and SAE J300. These oils are suitable for the lubrication of wheeled vehicles with compression-ignition (diesel) engines. This document supersedes the military's Commercial Item Description (CID) A-A-52306. Intended Use The lubricating oils described by this document are only intended for use in the engines of Tactical Wheeled and administrative vehicles equipped with diesel engine systems. The multigrade oils are suitable for use in 4-cycle diesel engines while the monograde oils are preferred for use in high output 2-cycle diesel engines. These lubricating oils are not a replacement for SAE J2359 (Lubricating Oil@ Internal Combustion Engine@ Military Combat/Tactical Service)@ nor is it intended for use in transmissions or hydraulic systems. Rationale This document was revised from its previous version to bring the performance requirements in harmony with current commercial standards.