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Engine Lubricant Specification
Maximum engine life and performance can be expected when the proper engine oil is used. There are significant variations in the quality and performance of the oils commercially available. Caterpillar Oils are formulated to provide maximum performance and life in your Caterpillar engine. They are offered in multi-viscosity grades to meet the performance and ambient temperature requirements for heavy duty diesel engines.The performance characteristics of the oil depends on the base oil and the additives. The additives in the oil will vary according to the properties of the base oil and the environment in which the oil will perform its function.Caterpillar Oil
To achieve the maximum engine life and superior performance in your diesel engine, Caterpillar recommends Caterpillar Diesel Engine Oil-DEO (API CF-4). Oils meeting the American Petroleum Institute (API CF-4) performance category possess the properties to operate effectively at the higher piston temperatures. As new Caterpillar engine designs are introduced to meet U.S. Environmental Protection Agency (EPA) 1990's emission requirements, the requirement is API CF-4 performance oils for these engines.Cat Oils have been developed, tested and approved by Caterpillar to provide the performance and life which has been designed and built into our engines. Cat Oils are currently being used for engine lab development and are offered by Caterpillar dealers for continued use. Consult your Caterpillar dealer for more information on these Cat Oils.The DEO (CF-4) oil is blended in viscosity grades of SAE 10W30 and 15W40. Multi-grade oils significantly lower oil consumption compared to single grades. Oil consumption and piston crown land deposits are very important in the engine tests used to evaluate oil performance.Commercial Oils
If oils other than Caterpillar oils are used, the following oil specifications provide guidelines for the selection of commercial products.* API specifications CF-4, CF-4/SF, or CF-4/SG
Failure to follow the commercial oil recommendation for API CF-4 performance oils can cause shortened engine life due to piston carbon deposits, liner bore polish and/or abnormally higher increasing oil consumption.API CC and CD oils are unacceptable in this Caterpillar diesel engine.
Lubricant Viscosity Recommendations
The proper SAE grade of oil to select is determined by the minimum outside temperature at which the engine will be started and the maximum outside temperature in which the engine will be operating. This recommendation is to ensure the correct viscosity is used until the next oil change.The recommendation would be to use the highest viscosity oil possible. Even though the ambient temperature may be low, operating engines can still be subjected to normal oil temperatures because of regulated temperature components. The higher viscosity oils will provide better protection to all components which it contacts during the full operating cycle.The use of API CF-4 multi-viscosity oils is recommended because of full protection through a wider temperature range. See chart for recommended viscosity and temperature range.To determine if the oil in the crankcase will flow in cold weather, remove the oil dipstick before starting. If the oil will flow off, the oil is fluid enough to circulate properly. Air Starting Motor Oiler
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