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Caterpillar does not warrant the quality or performance of non-Cat fluids.
How Fuel and Oil Affects Cat DPF Performance
For the maximum performance in filtration and regeneration efficiency, operating the Cat DPF with ultra-low sulfur diesel fuel (ULSD-S15), of less than 15 ppm sulfur by weight is recommended. ULSD fuel must meet the S-15 fuels designation in the latest edition of ASTM D975 and/or conform to Cat Fuel Specification. Using ULSD, regeneration for engines certified to Tier II and lower regulations will occur when the duty cycle is above 300° C (572° F) for at least 30 percent of the operating time. For Tier III and greater engines, consult Cat for operating requirements.Operating the Cat DPF on diesel engines using fuel with sulfur content greater than 50 ppm will increase the regeneration temperature requirements significantly of approximately 50-90°C (90-135°F). If the exhaust temperature meets these requirements, continuous regeneration still can take place. If the normal operation of the Cat DPF is on ULSD but the engine is accidentally fueled with high sulfur fuel the regeneration temperature requirements will increase accordingly. With added sulfur, the normal duty cycle of the engine may cause the filter to plug with particulate matter PM. This condition will cause the backpressure to increase beyond the engine manufacturer limits. This condition could damage the filter and/or the engine.When the fuel sulfur level is once again below 50 ppm, ULSD operating conditions will return. High sulfur fuel will not damage the catalyst coating or the ceramic filter. High sulfur fuel will change the regeneration requirements as stated above.Biodiesel fuel may be used up to the B20 blend level (20 percent biodiesel and 80 percent appropriate ULSD fuel) IF the final B20 blend conforms to ASTM D7467 and API gravity 30-45. The neat biodiesel blend stock should conform to ASTM 6751. Cat diesel engine oils (CAT DEO) have been developed and tested in order to provide the full performance and service life that has been designed and built into Cat engines. Catt oils are currently used to fill Cat Diesel Engines at the factory. These oils are offered by Cat dealers for continued use when the engine oil is changed. Consult your Cat dealer for more information on these oils.Cat DEO-ULSTM(Ultra Low Sulfur) Oil exceeds the performance requirements of API category CJ-4 oil and is recommended due to a low ash specification. Engine oil that meets or exceeds the specifications in the Cat ECF-3 or API CJ4 categories may be used in these applications. Oil burned during the combustion process accounts for almost all of the DPF ash accumulation (because of oil additives). The use of recommended low ash oil results in lower ash accumulation in the filter. Failure to use the recommended grade of oil may results in more frequent ash removal service intervals.Note: Cat DEO and Cat DEO-ULS multigrade oils are the preferred oils for use in this Cat Diesel Engine.
Table 1
Commercial Lubricants    Cat Lubricants    Viscosity Grade    
Diesel Engine Oil-Ultra Low Sulfur (API