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Lubricant Recommendations
Cat DEO (Diesel Engine Oil)
Due to significant variations in the quality and in the performance of commercially available oils, Caterpillar makes the following recommendations:
Cat DEO (Diesel Engine Oil) (10W-30)
Cat DEO (Diesel Engine Oil) (15W-40)Commercial Oils
Caterpillar does not warrant the quality or performance of non-Caterpillar fluids.
Note: If Cat DEO multigrade is not used, use only commercial oils that meet the following categories/specifications:
API CH-4 multigrade oils and API CI-4 multigrade oils are acceptable if the requirements of Caterpillar's Engine Crankcase Fluid -1 (ECF-1) specification are met. CH-4 oils and CI-4 oils that have not met the requirements of Caterpillar's ECF-1 specification may cause reduced engine life.
API CG-4 multigrade oils are acceptable for all Caterpillar diesel engines. When the API CG-4 oils are used, the oil drain interval should not exceed the standard oil drain interval for your engine.Note: Do not use API CF-4 oils in Caterpillar diesel engines.Viscosity of Engine Oil
The proper SAE viscosity grade of oil is determined by the minimum ambient temperature during cold engine start-up, and the maximum ambient temperature during engine operation. To determine the oil viscosity that is required for starting a cold soaked engine, refer to the minimum temperature in Table 1. To select the oil viscosity for operation at the highest anticipated ambient temperature, refer to the maximum temperature in the Table. Use the highest oil viscosity that is available in order to meet the required temperature during start-up.
Table 1
Engine Oil Viscosities for Ambient Temperatures    
    Ambient Temperature    
Viscosity Grade     Minimum     Maximum    
SAE 0W-20    
−40 °C (−40 °F)    
10 °C (50 °F)    
SAE 0W-30    
−40 °C (−40 °F)    
30 °C (86 °F)    
SAE 0W-40    
−40 °C (−40 °F)    
40 °C (104 °F)    
SAE 5W-30    
−30 °C (−22 °F)    
30 °C (86 °F)    
SAE 5W-40    
−30 °C (−22 °F)    
50 °C (122 °F)    
SAE 10W-30    
−18 °C (0 °F)    
40 °C (104 °F)    
SAE 10W-40    
−18 °C (0 °F)    
50 °C (122 °F)    
SAE 15W-40    
−9.5 °C (15 °F)    
50 °C (122 °F)    Oil Change Intervals
Note: Decrease the interval between oil changes by 20 percent and/or increase the API service classification of the oil for engines that operate at high load factors of 80 percent or more for extended periods of time. Refer to Caterpillar Publication, PEDP7035, "S O S Fluid Analysis Interpetation Guide" in order to fully understand optimizing oil change intervals.Refer to Operation and maintenance Manual, "Engine Oil and Filter - Change" for more information about oil change intervals .Lubricant Capacities
The capacity of the engine lubrication system includes the capacity of the oil filters that are installed at the factory. Auxiliary oil filter systems (if equipped) will require additional oil. Refer to the specifications that are provided by the OEM of the auxiliary oil filter system. 3512B Engine
Table 2
Approximate Refill Capacity for the 3512B Engine Lubrication System    
Compartment or System    Liters    US Gallons    
Engine Crankcase     (644 L)     170 US gal    Fuel
Fuel Recommendations
In North America, diesel fuel that is identified as No. 1-D or No. 2-D in "ASTM D975" generally meet the specifications. These fuels are distilled from crude oil. Diesel fuels from other sources could exhibit detrimental properties that are not defined or controlled by this specification.Refer to Special Publication, SEBU6251, "Caterpillar Commercial Diesel Engine Fluids Recommendations" for additional information that relates to diesel fuel.Cooling System
Coolant Recommendations
The following two types of coolants may be used in Caterpillar diesel engines:Preferred - Cat ELC (Extended Life Coolant) or a commercial extended life coolant that meets the Caterpillar EC-1 specificationAcceptable - Cat DEAC (Diesel Engine Antifreeze/Coolant) or a commercial heavy-duty coolant/antifreeze that meets "ASTM D4985", or "ASTM D6210" specifications
Do not use a commercial coolant/antifreeze that only meets the ASTM "D3306" specification. This type of coolant/antifreeze is made for light duty automotive applications.Use only the coolant/antifreeze that is recommended.
Caterpillar recommends a 1:1 mixture of water and glycol. This mixture will provide optimum heavy-duty performance as a coolant/antifreeze.Note: Cat DEAC DOES NOT require a treatment with an SCA at the initial fill. Commercial heavy-duty coolant or antifreeze that meets "ASTM D4985" or "ASTM D6210" specifications MAY require a treatment with an SCA at the initial fill. Read the label or the instructions that are provided by the OEM of the product.In stationary engine applications and marine engine applications that do not require protection from boiling or freezing, a mixture of SCA and water is acceptable. Caterpillar recommends a minimum of six percent to a maximum of eight percent SCA concentration in those cooling systems. Distilled water or deionized water is preferred. Water which has the required properties may be used. Refer to Special Publication, SEBU6251, "Caterpillar Commercial Diesel Engine Fluids Recommendations" for additional information that pertains to coolants.Note: Table 3 is a list of the coolants that are