Liquid products of coking of heavy resin of pyrolisis – petrol, light and heavy gasoil have been studied. It has been established that inclusion of fractions of light gasoil into the composition of diesel fuel does not aggravate quality indices of obtained compound fuels. Besides, in the fraction of light phlegma obtained at Vo/Vp=0.11 at the expense of the return of heavy fractions, involved in coke-formation, the coking capacity of residues of diesel fuel decreases, while other indices improve: contents of actual resins, viscosity and temperature of solidification reduces.