SEAL-O-RING 1178765 - Caterpillar

Refer to this Operation and Maintenance Manual, "Severe Service Application" for information about operating an engine in a severe service application.Note: The interval for changing the coolant varies depending on the type of coolant being replaced. Refer to this article, "Coolant Recommendations", for the intervals for changing the coolant.Diesel Engine Oil
For more information, refer to Special Publication, SEBU6251, "Cat Commercial Engine Fluids Recommendations".Cat Diesel Engine Oil (Cat DEO)
Cat oils have been developed and tested in order to provide the full performance and service life that has been designed and built into Cat engines. Cat oils are currently used to fill Cat Diesel Engines at the factory. These oils are offered by Cat dealers for continued use when the engine oil is changed. Consult your Cat 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:
Table 1
Cat Lubricants Viscosity Grade
Diesel Engine Oil-Ultra Low Sulfur Cat DEO-ULS SAE 15W-40
SAE 10W-30
Cat DEO-ULS SYN SAE 5W-40
Cat Cold Weather DEO-ULS SAE 0W-40
Diesel Engine Oil Cat DEO SAE 15W-40
SAE 10W-30
Cat DEO SYN SAE 5W-40 Note: Cat DEO and Cat DEO-ULS multigrade oils are the preferred oils for use in this Cat Diesel Engine.Commercial Oil
Note: Non-Cat commercial oils are second choice oils for your engine.
Caterpillar does not warrant the quality or performance of non-Cat fluids.
The three current Caterpillar ECF specifications are: Cat ECF-1-a, Cat ECF-2 and Cat ECF-3. Each higher Cat ECF specification provides increased performance over lower Cat ECF specifications.A commercial oil must meet the following standards to be considered an equivalent of a Cat Diesel Engine Oil:
Table 2
Cat Engine Crankcase Fluids (ECF) Definitions
Cat Performance Requirement Cat ECF Specifications Requirements
Cat ECF-3 API CJ-4 Oil Category performance requirements
Cat ECF-