Kerosine is a (refinery) cut above diesel. It is lower in viscosity, and higher in volitility. It will run well in almost any diesel engine but there are advantages and drawbacks. Advantage is better flow at low temperatures with kero blends, and easier starting. Disadvantage is (mentioned above) poorer lubricity, which is reported to cause injector and pump wear. I've never seen this actually documented, just "war stories". It does, however, have a lower "heating value" which means a gal of kero has less potential energy than a gal of diesel. This translates to poorer fuel economy. The more kero blended, the worse the fuel mileage. As far as I know, major fuel suppliers still make "winter blends" using kero. (No. 1 diesel is kero and kero is jet fuel. #2 diesel is same as heating oil)