I have run several gallons of JP-8 through my RAM 750. There should be no issues with running JP-8, Jet-A, or Kero in this motor. You may see a slight EGT difference between the three and that's about it. Some will burn slightly hotter than others. Specific gravity of the fuels are very similar, also. When we flew cross-country in Army choppers and switched from the old JP-4 to Jet-A we noticed a slight EGT rise (10-20deg), that's about it.