C8.3 Commercial Marine and Ind [...] Fuel Recommendations and Specifications Section V - Maintenance Specifications Page V-7 Fuel Recommendations and Specifications Fuel Recommendations Do not mix gasoline, alcohol, or gasohol with diesel fuel. This mixture can cause an explosion. WARNING CAUTION 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 fuel pump and the fuel injectors. CAUTION Cummins recommends the use of ASTM Number 2D fuel. The use of Number 2D fuel will result in optimum engine performance.
Lighter fuels can reduce fuel economy and can possibly damage the fuel injection pump. At operating temperatures below 0°C [32°F], acceptable performance can be obtained by using blends of Number 2D and Number 1D. The viscosity of the fuel must be kept above 1.3 cSt at 40°C [104°F] to provide adequate fuel system lubrication. The following chart lists acceptable alternate fuels for C8.3 Series engines. Acceptable Substitute Fuels - Cummins C8.3 Fuel System Number 1D Diesel(1)(2) Number 2D Diesel Number 1K Kerosene Jet-A Jet-A1 JP-5 JP-8 Jet-B JP-4 CITE OK OK OK OK OK OK OK NOT OK NOT OK NOT OK