The sulfur compounds content of the gasoline fractions of shale oil and oil obtained from used tires was investigated by the method of gas chromatography (GC). There was a marked difference in quantitative chromatograms estimation between the normalization method and the internal standardization method. The application of the internal standardization method proved to be preferable. In addition, the results obtained on the content of sulfur compounds in the studied gasoline fractions allow us to conclude that the co-processing of used tires with oil shale will not affect the quality of the light fraction of oil produced and thus, it enables not to change the method of purification from sulfur compounds.