Greg,
If you read attently, JP8 mix reported as no2 in DIESEL FUELS, OILS, COMBUSTIBLES AND ADDITIVES has been run on FOUR STROKES ENGINES PREHEATED WITH GASOLINE WITH SPARK IGNITION, This means that JP8 is vapourized when entering in the liner, so NO DILUITION happens and the engine runs on combustible vapour and oil droplets, exactly as it has to work.
As for vegetable oils, castor is not all, since its reduced solubility in kerosene renders difficult to achieve low ether mixes stable at low temperatures This is why I am developing a vegetable oil useful for these conditions.
So far olive mixed with castor is promising, with NO modification at all, hopefully, but I have yet to asses well its characteristics and possible (VERY POSSIBLE) improvements.
Ugo