The present study exports a regression equation which describes the variation of humidity and reduction conductivity of JP8 (F34) with time. A hydrophilic polymer is used to eliminate humidity from JP8 and the regression analysis shows that the maximum decrease of humidity in an hour it is of about similar to 39% and conductivity's in two hours it is of about similar to 36% respectively. The elimination of humidity makes the fuel suitable for car machines and gives combustion with less pollution for the environment. Thus, the quality of the fuel as well as its combustion efficiency can be improved while the reduction of water concentration enhances the secure of the combustion machine's operation. DOI: 10.1134/S0965544112060138