Lubricating Oil Recommendations and Specifications C8.3 Commercial Marine and Ind [...] Page V-10 Section V - Maintenance Specifications General Information Midrange engines with 1999 U.S.A. certification will have 500-hour maximum oil drain intervals using CES20071 (CH-4) or better lubricating oil. Non-U.S.A. certified engines will have 500-hour oil drain intervals using CES20071 (CH-4) or better lubricating oil. The use of quality engine lubricating oils, combined with appropriate oil drain and filter change intervals, are critical factors in maintaining engine performance and durability.
Cummins recommends the use of a high-quality SAE 15W-40 multiviscosity heavy-duty engine oil, such as Cummins Premium Blue®, that meets the requirements of Cummins Engineering Specification CES20071 or CES20076, or the American Petroleum Institute (API) performance classification CG-4 or CH-4. NOTE: In areas where CG-4 or CH-4 lubricating oils are not available, CES20075 can be used but the lubricating oil change interval must be reduced to 12,070 km [7500 mi], or 250 hours. A sulfated ash limit of 1.0 mass percent is suggested for optimum valve and piston deposit and oil consumption control. The sulfated ash must not exceed 1.85 mass percent.
For further details and discussion of engine lubricating oils for Cummins engines, refer to Cummins Engine Oil Recommendations, Bulletin Number 3810340, or a Cummins Authorized Repair Facility.