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Model year 2007 and newer (U.S. EPA 2007 certified) on-highway diesel engines REQUIRE the use of Ultra Low Sulfur Diesel (ULSD) fuel (≤ 15 ppm sulfur)."Sulfur-free" diesel fuel (≤ 10 ppm sulfur) is strongly recommended for use in "EURO IV" certified on-highway diesel engines, while diesel fuel with ≤ 50 ppm sulfur is acceptable.Low Sulfur Diesel (LSD) fuel (≤ 500 ppm sulfur) is strongly recommended (required in the U.S.) for use in model year 2006 and older on-highway diesel engines, while diesel fuel with ≤ 5000 ppm sulfur is acceptable for use in areas of the world where allowed by law. Diesel Oxidation Catalyst (DOC) equipped engines require the use of LSD fuel or ULSD fuel.
Note: In the U.S., burning fuel with greater than 15 ppm sulfur in model year 2007 and newer on-highway diesel engines is illegal and punishable with civil penalties.In the United States (U.S.), LSD will have 0.05 percent (500 ppm) maximum sulfur. ULSD will have 0.0015 percent (15 ppm) maximum sulfur. Refer to this Special Publication, "Distillate Diesel Fuel" article for additional information. Also, refer to the most current revision level of "ASTM D975 (Standard Specification for Diesel Fuel Oils)" for additional information.Note: "ASTM D975" currently allows up to 5 percent biodiesel blends. Refer to this Special Publication, "Fuel Specifications" and the "Biodiesel" topic for guidance when biodiesel will be used.In Europe, the commonly available diesel fuel will have 0.005 percent (50 ppm) maximum sulfur. In Europe, ULSD fuel will have 0.0010 percent (10 ppm) maximum sulfur, and is typically referred to as "sulfur-free". Refer to the most current revision level of "European Standard EN 590 (Automotive Fuels - Diesel - Requirements and Test Methods)" for additional information.Note: "EN 590" currently allows up to 5 percent biodiesel blends. Refer to the "Fuel Specifications" section and the "Biodiesel" topic in this Special Publication for guidance when biodiesel will be used.In the United States (U.S.), a new 0.0015 percent (15 ppm) limit on fuel sulfur was introduced for the on-highway diesel engine market in October of 2006. Owners of model year 2007 and newer (U.S. EPA 2007 certified) on-highway diesel engines must refuel only with ULSD. Owners of 2006 and older model year on-highway diesel engines may use ULSD or LSD fuel during the transition period. In the U.S., starting December of 2010, only ULSD will be available for on-highway use. The 2007 and newer on-highway diesel engines are designed to operate on ULSD. Use of LSD or other fuels with more than 15 ppm sulfur in these engines will reduce engine efficiency and engine durability, and may damage emission control systems. Failures that result from the use of fuels are not Caterpillar factory defects. Therefore, the cost of repair would not be covered by a Caterpillar warranty.Note: The fuel lubricity is important. You should consider the fuel's lubricity whenever you operate the equipment in arctic weather. Also, you should consider the fuel's lubricity whenever you use fuels that are lower in viscosity or that have