Reference. Information is given on domestic and foreign additives to motor gasoline and diesel fuel approved for use in Russia, as well as on some samples of additives that have successfully passed bench and operational tests. The purpose of additives, their principle of operation, basic quality indicators, assortment, technical and economic efficiency of application, methods of determination in fuels are considered. Great importance is paid to the peculiarities of the use of additives, their shortcomings, toxicology and safety issues. For specialists involved in the production, sale and use of automotive fuels. It will be useful for students, graduate students and teachers of chemical-technological and technical universities.