Ecological requirements to the quality of diesel fuel are becoming stricter every year due to the introduction of new standards to its main quality scores. It makes producers look for progressive and efficient methods of improving the operational characteristics of motor fuels. Production of ultra-low sulphur diesel led to the failure of the fuel equipment due to the lubricity reduction of the latter. Antiwear additives are used to compensate for the lower lubricity of severely hydrotreated diesel fuels. The main share of the market of antiwear additives in Russia is occupied by additives of foreign manufacture. And it is very important task to develop domestic production that would make up for the imported additives. We investigated the impact of various types of hydrocarbons and oxygenates on the diesel fuel lubricity. Following the results of the research, we have found that the most efficient compounds among the investigated types of hydrocarbons and oxygenates are aromatic hydrocarbons and esters. It is also shown that the value of CWSD is reducing with increasing of the number of carbon atoms in the molecule of the esters. The linear alkanes positively impact on the lubricity of diesel fuel only at relatively high concentrations whereas n-alkenes are inert to the change of its lubricity.

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