https://www.truck-manuals.net/mack/ 236 MAINTENANCE AND LUBRICATION
CAUTION Ultra Low Sulfur Diesel (ULSD) fuel with a maximum sulfur content of 15 ppm must be used in order to meet Euro4 engine emission requirements. Using otherwise approved diesel fuels with a maximum sulfur content greater than 500 ppm may shorten engine life and void the engine warranty.
Air is always present inside the fuel tanks, entering mainly through the tank ventilation. With the air being heated and cooled, condensation is formed and water is mixed in the fuel. To avoid condensation when the vehicle is parked for longer periods, fill the tanks up to 95% of capacity. Do not fill more than that, as the fuel needs to have room for expansion during the heat of the day.
BioDiesel Soy Methyl Ester (SME or SOME) BioDiesel fuel in blends up to a B5 concentration (5% blend) is approved by Mack Trucks, Inc. Note: Although higher concentrations are available, concentrations up to B5 (maximum) are the only blends currently approved by Mack Trucks, Inc. Note: MACK Engines are certified to comply with U.S. EPA and California Air Resources Board (CARB) emissions standards based on the use of reference test fuels commonly available in the United States and specified in this manual. Use of alternative fuels, including BioDiesel, may affect engine emissions. Mack Trucks, Inc. does not warrant, and is not responsible for ensuring that the engines will comply with U.S. EPA and CARB emissions standards.
B5 Approval For Mack US10 Certified Products Mack engines are certified to comply with U.S. EPA and California emissions standards based upon the use of test fuels with specifications established by these regulatory agencies. Alternative fuels, including biodiesel, that are not substantially similar to the required test fuels may adversely affect engine emissions compliance and may impact the performance of certain emissions aftertreatment components. As a result, Mack does not warrant the engine will conform to applicable Federal or California emissions limits when operated on, or having operated on, biodiesel or other alternative fuels that are not substantially similar to specified test fuels used for certification. The use of biodiesel up to a maximum of 20% (B20) in and of itself, will not affect the manufacturers mechanical warranty as to engine and emissions system related components except as limited below with respect to aftertreatment components, provided the bio fuel used in the blend conforms to ASTM D6751 and B1 to B5
