We have determined the primary jet fuel performance properties that have the greatest impact on how effectively they can be used in diesel engines, requiring improvement with the help of functional additives. We have studied the effect of a cetane improver additive based on 2-ethylhexyl nitrate and an antiwear additive based on higher carboxylic acids on the performance properties of jet fuels when they are used in diesel engines, and we have optimized their composition. We present the results of a study of the proposed fuel compositions based on jet fuel and functional additives, using laboratory and qualification methods and indicator properties for the D-245.125 engine cycle.