Kerosene and #1 diesel are generally equivalent. In refining, kerosene/#1 diesel is the portion that boils off right after gasoline. It has less lubricity and a lower heat content than #2 diesel. The 1928 Case model CC I have in front of my place has a 2 fuel tank system. It starts and warms up on gasoline, but then is switched over to lower cost kerosene which runs through a heat exchanger to warm the fuel before going into the carburetor. I'd try to limit use of kerosene to prolong fuel pump and injector life .