GENERAL DIESEL FUEL SPECIFICATIONS DIESEL FUEL SPECIFICATIONS Do not mix gasoline or alcohol with diesel fuel. This mixture can cause an explosion. and excessive smoke. At operating temperatures below -12 E C (+10 E F), use ASTM Grade No. 1-D diesel fuel. The use of lighter fuels can reduce fuel economy. Due to the precise tolerances of diesel injection systems, it is extremely important that the fuel be kept clean and free of dirt or water. Dirt or water in the system can cause severe damage to both the injection pump and nozzles. Where a winterized blend of Grade No. 2-D and No. 1-D fuels is available, it may be substituted for Grade No. 1-D fuel.
However, it is the supplier's responsibility to provide the fuel for the anticipated ambient temperature. For normal service above -12 E C (+10 E F), the use of ASTM Grade No. 2-D diesel fuel with a minimum Cetane number of 40 is recommended. The use of No. 2-D diesel fuel will result in optimum engine performance under most operating conditions. Fuels with Cetane numbers higher than 40 may be needed in high altitudes or extremely low ambient temperatures to prevent misfires Use a low sulfur content fuel having a cloud point that is at least 10 degrees below the lowest expected fuel temperature. Cloud point is the temperature at which crystals begin to form in the fuel.
The viscosity of the fuel must be kept above 1.3 cSt to provide adequate fuel system lubrication. 01-9