Fuel Recommendations and Specifications C8.3 Commercial Marine and Ind [...] Page V-8 Section V - Maintenance Specifications Any adjustment to compensate for reduced performance with a fuel system using alternate fuel is not warrantable. Winter blend fuels, such as those found at commercial fuel dispensing outlets, are combinations of Number 1D and Number 2D diesel fuel and are acceptable. Additional information for fuel recommendations and specifications can be found in Fuel for Cummins Engines, Bulletin Number 3379001. See the ordering information in the back of this manual.