WASHER 4B4276 - Caterpillar

These recommendations are subject to change without notice. Contact your local Caterpillar dealer for the most up to date fluids recommendations.
Engine Oil
API Oils
The Engine Oil Licensing and Certification System by the American Petroleum Institute (API) is recognized by Caterpillar. For detailed information about this system, see the latest edition of the "API publication No. 1509". Engine oils that bear the API symbol are authorized by API.
Illustration 1 g00546535
Typical API symbolDiesel engine oils CC, CD, CD-2, and CE have not been API authorized classifications since 1January 1996. Table 1 summarizes the status of the classifications.
Table 1
API Classifications (1)    
Current     Obsolete    
CI-4 (2), CH-4 (2), CG-4 (3), CF-4 (4)     CE    
CF (5)     CC, CD    
CF-2 (6)     CD-2 (6)    
( 1 ) Applicable for 3500 series and smaller commercial diesel engines.
( 2 ) API CH-4 and CI-4 oils are acceptable if the requirements of Caterpillar's ECF-1 (Engine Crankcase Fluid specification-1) are met. CH-4 and CI-4 oils that have not met the requirements of Caterpillar's ECF-1 Specification may cause reduced engine life.
( 3 ) API CG-4 oils are acceptable for all Caterpillar diesel engines. When the API CG-4 oils are used, the oil drain interval should not exceed the standard oil drain interval for your engine.
( 4 ) API CF-4 oils are not recommended for Caterpillar 3500 series diesel engines. For all other commercial diesel engines, the oil drain interval should not exceed 50 percent of the standard oil drain interval for your engine with a maximum oil drain interval of 125 hours. Exceptions to this statement are the 3116 marine engines and the 3126 marine engines that use mechanical unit injection.
( 5 ) API CF oils are not recommended for Caterpillar 3500 Series and smaller Direct Injection (DI) diesel engines.
( 6 ) API CF-2 and CD-2 oils are classifications for two-cycle diesel engines. Caterpillar does not sell engines that utilize the CD-2 and the API CF-2 oils.Note: When oil meets more than one API classification, the applicable footnote is determined by the highest API classification that is met.Example - An oil meets both the API CH-4 and the API CF oil classifications. In this case, the API CH-4 applies.Caterpillar Diesel Engine Oil (DEO)
Caterpillar Oils have been developed and tested in order to provide the full performance and service life that has been designed and built into Caterpillar Engines. Caterpillar Oils are currently used to fill diesel engines at the factory. These oils are offered by Caterpillar dealers for continued use when the engine oil is changed. Consult 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 makes the following recommendations:
Cat DEO (Diesel Engine Oil) (10W-30)
Cat DEO (Diesel Engine Oil) (15W-40)Caterpillar multigrade DEO is formulated with the correct amounts of detergents, dispersants, and alkalinity in order to provide superior performance in Caterpillar Diesel Engines.Commercial Oils
Engine Crankcase Fluid Recommendations for all Caterpillar 3500 Series and smaller direct injection