In the context of growing demand for energy carriers and the development of the petrochemical industry, the relevance of studying the physico-chemical characteristics of oils is increasing, as these properties determine the efficiency of extraction, transportation and processing of hydrocarbon raw materials. The purpose of the article is to conduct a review of the key physico-chemical properties of Romashkino oil based on the analysis of literary sources and experimental data, including density, viscosity, fractional and elemental composition. The leading approach is a theoretical analysis of data from reference books, scientific publications and modern petrochemical studies. The results include a generalization of data on density (0.850–0.870 g/cm³), viscosity (8–15 cSt at 20°C), elemental composition (carbon 84–86%, hydrogen 12–13%, sulfur 1.5–2.0%), paraffin content (4–6%) and asphaltenes (3–5%). Understanding these characteristics makes it possible to optimize the processes of production, transportation and processing of Romashkino oil, minimize risks and improve the quality of petroleum products.