This article presents aspects related to usage of prospective bio-mixture, which consists of mineral diesel fuel and synthetic hydrocarbons, as a new component of fuel, in order to fulfill the requirements of the National Index Target. Research on the new formula of the fuel was conducted on new-generation, compression ignition engine quipped with common rail fuel injection. Research was conducted in conditions of external velocity performance analysis specifications for defined rotational speed of crankshaft and at full load. Two mixtures of fuel consisting of 5% and 10% (vol/vol) synthetic hydrocarbons were used in the experiment. Synthetic fuel is a result of catalytic conversion of bio-ethanol into hydrocarbons mixture which is realized according to ETG technology. The resultant oil fraction is a mixture of hydrocarbons which mix at any ratio with petroleum hydrocarbons, entirely free of benzene, alcohols, sulfur, phosphorus and metals. The aim of performing the ecological.