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Total Base Number (TBN) and Fuel Sulfur Levels For Caterpillar DI Diesel Engines
The TBN required in a new oil depends on the sulfur level of the fuel used. For direct injection engines running on distillate diesel fuel, the minimum new oil TBN (by ASTM D2896) should be 10 times the fuel sulfur level, and the minimum TBN is 5 regardless of a low fuel sulfur level- refer to the following graph.
Y = oil TBN shown by ASTM D2896.
X = percent of fuel sulfur by weight.
New oil TBN (1).
Change oil when the used oil TBN limit (2) is reached.In areas where the fuel sulfur exceeds 1.5 percent, choose an oil with the highest TBN that is within the API CF-4 or CG-4 categories, and shorten the oil change interval based on oil analysis. The oil analysis should evaluate oil condition and wear metals. High TBN oils that are not within the API CF-4 or CG-4 categories can produce excessive piston deposits, leading to a loss of oil control and bore polishing.
Operating DI diesel engines with fuel sulfur levels over 1.0 percent may require shortened oil change intervals in order to maintain adequate wear protection.
Lubricant Viscosity Recommendations For Caterpillar DI Engines
The proper SAE viscosity grade oil is determined by the minimum outside temperature at cold engine start-up, and the maximum outside temperature during engine operation. Use the minimum temperature column on the chart to determine the oil viscosity required for starting a "cold soaked" engine. Use the maximum temperature column on the chart to select the viscosity for operation at the highest temperature anticipated. In general, use the highest viscosity oil available that still meets the start-up temperature requirements. Engine Lubricant Recommendations Summary
To achieve all the performance that was built into a Caterpillar engine, follow these guidelines: * Select the proper Caterpillar oil or commercial oil that meets the API specifications* Select the proper oil viscosity based on the applicable Lubricant Viscosities chart* Replace the engine oil and oil filter(s) at the intervals specified in the Operation and Maintenance Manual* Perform maintenance according to the Operation and Maintenance ManualCaterpillar Lubricating Grease
Caterpillar provides grease for a variety of applications and extreme temperature conditions. The descriptions of these products follow.Contact your Caterpillar dealer for part numbers and available container sizes. One grease may be incompatible with another grease. When using commercial grease, make sure the grease is compatible with the grease used in your system, or make sure to purge the system. Contact your supplier regarding grease compatibility questions.Multipurpose Grease
Multipurpose Lithium Complex Grease (MPG)
MPG is a NLGI No.2 general purpose lithium complex grease for light to medium duty applications. MPG has good high temperature characteristics, with a minimum dropping point of 260°C (500°F). MPG contains unleaded extreme pressure additives and antiwear and corrosion inhibitors to provide extra protection in a variety of construction, agricultural and automotive applications.MPG meets the requirements for extended service intervals of automotive chassis points and wheel bearings with disc brakes, particularly in passenger cars, vans, light trucks and