This article presents the results of studies on the use of multifunctional diesel fuel additives, which will reduce harmful emissions of NOx, COx, SOx into the environment by improving the operational and environmental characteristics of the original fuel and converting harmful emissions of nitrogen oxides, carbon, and sulfur into useful energy, optimize fuel consumption and increase the performance and service life of ICE units and components without changing the indicators (requirements) of State Standard for fuel, achieve diesel fuel savings of 3-5% of the total fuel consumed.