The oil belongs to the group of residual hydrocarbon fractions obtained in the process of refining. The properties of the oil depends on the initial properties of crude oil and its depth of processing at the refineries. Oil, as the final product of oil refining, contains ballast - non-combustible part consisting of a mineral mass, of water. In the process of cracking oil, light hydrocarbon fraction, gasoline, kerosene, diesel fuel saturated oil with hydrogen to a greater extent, therefore, the hydrogen content of fuel oil compared to crude oil decreases, which leads to the decrease of its calorific value.

 The lower calorific value of fuel oil due to increased content in its composition of sulfur, nitrogen, oxygen, resins, asphaltenes, ash, solids. Mineral mass of oil has a significant amount of various metals, including vanadium. Vanadium is concentrated in the petroleum resins, asphaltenes, and major sulfur-containing components. Vanadium oxides cause a low-temperature and high-temperature, at 600-700°C, the corrosion of metals, resulting in the destruction of the heating surfaces, sealing surfaces of the exhaust valves, and gas turbine blades.

 According to the international standards of quality mineral mass, emulsion should not exceed 0.1% to 0.3%, but despite her small content produced by the combustion of fuel oil ash settle on the heating surfaces of boilers, significantly reduces heat transfer from the combustion products. Ash deposits on the surfaces of the piston diesel engines cause accelerated wear of the rubbing surfaces, inhibit the transfer of heat to the cooling medium.

During transportation and storage in containers as oil changes. As a result of continuous oxidation, polymerization, chemical reactions, hydrocarbon fuel converted into solid products precipitated. In cold weather during the heating of railway tanks with live steam, the water content in oil can reach 10-15%. During further storage fuel oil extra watered with atmospheric moisture. Analyses of the quality of the fuel oil stored in tanks at one of the depots showed that the water content in the samples collected at the level of 4-5 m from the bottom reaches 5%, and in the bottom layers -12%.

 Shipment of oil is carried out by rail directly from the manufacturer. The fuel supply rail is needed to supply fuel oil industrial enterprises and organizations that use in the manufacture and consume fuel oil, diesel fuel, gasoline, bitumen and other petroleum products. The delivery of fuel, namely oil, is always on time.