C8.3 Commercial Marine and Ind [...] Lubricating Oil Recommendations and Specifications Section V - Maintenance Specifications Page V-9 Lubricating Oil Recommendations and Specifications New Engine Break-in Oils A sulfated ash limit of 1.85 percent has been placed on all engine lubricating oils recommended for use in Cummins engines. Higher ash oils can cause valve and/or piston damage and lead to excessive oil consumption. CAUTION CAUTION The use of a synthetic-based oil does not justify extended oil change intervals. Extended oil change intervals can decrease engine life due to factors such as corrosion, deposits, and wear.
Special break-in engine lubricating oils are not recommended for new or rebuilt Cummins engines. Use the same type of oil during the break-in as used in normal operation. Additional information regarding lubricating oil availability throughout the world is available in the Lubricating Oils Data Book for Heavy-Duty Automotive and Industrial Engines. It can be ordered from:
Engine Manufacturers Association (EMA), Two North LaSalle Street, Chicago, IL 60602; (www.engine-manufacturers.org) Precautions and Instructions for Proper Kit Use If an engine is operated in ambient temperatures consistently below -23°C [-9°F], and there are no provisions to keep the engine warm when it is not in operation, use a synthetic CE/SF or higher API classification engine oil with adequate low-temperature properties such as 5W-20 or 5W-30. The oil supplier is responsible for meeting the performance service specification represented with its product.