Adds functionality and a locomotive for using fluids as fuel. Can use heavy oil, light oil, or diesel (if added by another mod), or all three. Configurable in Settings -> Mod Settings.
For every fluid that has fuel values? As option to use any fluid as fuel. instead of some diesel + oils...
Simply put, because I (and I get the impression the original author felt the same) that these locos should not run off from just anything for fuel (within the concept and scope of this mod itself).
Okay np :)