The article presents the opportunity to power internal combustion engine by treated and non-purified biogas. Internal combustion engines may be operated only within a certain range of parameters of fuel due to the design and method of operation. Furthermore, they are sensitive to changes in chemical composition of the fuel. The aim of the work described in the studies was to test the quality of biogas that can be obtained by methane fermentation of the test material. Considering the treatment of biogas as a consumable in vehicles, its physicochemical properties can be very diverse. It is reasonable therefore to analysis biogas composition of samples from various biogas plants, in the context of the possibility of its use in a motor vehicle with an internal combustion engine. The article presents an analysis of the chemical composition of untreated biogas collected from five representative biogas plants. Then it summarizes the data received with the requirements of the standards referred to European countries and set out the possibility of direct use of untreated and untreated biogas during the operation of vehicles with combustion engines.