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API Licensed Oils
Caterpillar recognizes and supports the American Petroleum Institute (API) "Engine Oil Licensing and Certification System" for engine oils. The API publication No. 1509, 13th edition, contains the detailed information concerning this system. Engine oils bearing the API symbol are licensed by the API.
Examples of the API symbol.Diesel engine oil classifications CD, CD-2, and CE are obsolete API categories. Caterpillar will only reference those categories that are currently licensed by the API. The following chart summarizes the status of the categories. CF is NOT the same as CF-4. API CF oils are only recommended for Caterpillar engines with precombustion chamber (PC) fuel systems.In previous lubricant specifications, Caterpillar referred to US Military oil specifications (MIL) and to European Comite des Constructeurs d'Automobile Marche Commun (CCMC) diesel engine oil specifications. Those specifications do not provide identical performance to API CF, CF-4 or API CG-4 engine oils. Therefore, Caterpillar will not make reference to MIL or to CCMC specifications in this publication.Grease
The National Lubricating Grease Institute (NLGI) classifies grease, based on the American Society for Testing and Materials (ASTM) D217-68 Worked Penetration characteristics. Grease characteristics are given a defined consistency number.Terminology
Some abbreviations follow the Society of Automotive Engineers (SAE) J754 nomenclature. Some classifications follow the SAE J183 abbreviations. The definitions other than Caterpillar's will be of assistance in selecting lubricants.Caterpillar Diesel Engine Oil (DEO)
Caterpillar Oils have been developed, tested, and approved by Caterpillar to provide the full performance and service life that has been designed and built into Caterpillar diesel engines. Caterpillar oils are currently used for factory fill in diesel engines. These oils are offered by Caterpillar dealers for continued refill use. Consult with your Caterpillar dealer for more information on these oils.Due to significant variations in the quality and in the performance of commercially available oils, Caterpillar recommends:Caterpillar Diesel Engine Oil (DEO) 15W40 Caterpillar Diesel Engine Oil (DEO) 10W30
Caterpillar multigrade DEO is formulated with detergents, dispersants, and sufficient alkalinity to provide superior performance in Caterpillar diesel engines. Multigrade DEO is blended in two viscosity grades: SAE 15W40 and SAE 10W30. Refer to the Lubricant Viscosities For Ambient Temperatures chart to choose the correct viscosity grade based on ambient temperatures. Multigrade oils provide the correct viscosity for a broad range of operating temperatures and for cold engine starts. Multigrade oils are also effective in maintaining low oil consumption and low levels of piston deposits.Caterpillar multigrade DEO is also qualified for use in other diesel engines and in gasoline engines. Refer to the engine manufacturer's guide for the recommended specifications. Compare the recommendations to the specifications of Caterpillar multigrade DEO. The current Caterpillar multigrade DEO industry specifications are listed on the product labels and on the product data sheets.Contact your Caterpillar dealer for part numbers and available container sizes.Commercial Diesel Engine Oils
The performance of commercial diesel engine oils is based on API categories. API categories are developed to provide commercial lubricants for a wide variety of diesel engines that operate in various conditions.If Caterpillar multigrade DEO is not used, the