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Emergency oil spills during main pipeline transportation have an extremely negative impact on the ecosystem. It is not possible to estimate the effects of oil spills, because oil is a product of long period decay. Oil pollution compromises processes proceeding in the biosphere, changes the living conditions of living organisms and their interrelation. Oil spills need to be prevented for negative impact reduction or, in case of an accident occur, spill need to be stopped and consequences need to be eliminated in a short time. Accident prevention is achieved by observing the requirements and rules of engineering surveys and pipeline design. If the requirements of standards are complied with, the hydrogeological and climatic features of the district are considered during design, construction and operation, the pipeline should work without accidents during the service life. But accidents may occur as a result of human factors, natural calamities and other unexpected circumstances. Oil spill prevention is not simple and not standard task. For time and costs reducing universal tool for oil spill prevention needs to be invented. This tool needs to be used before temporary clamping structure will be installed.

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The results of the study of the thermo-oxidative stability of Castrol Magnatec R 10W-40 SL/CF partially synthetic engine oil with cyclic test temperature changes from 150 to 180 °C and from 180 to 150 °C taking into account the thermal energy absorbed by the products of oxidation and evaporation are presented. The graphical dependences of the decimal logarithm of the thermal energy absorbed by thermostatic products on the decimal logarithm of the test time are obtained, which are described by linear equations in the cycles of increasing and lowering the test temperature, which made it possible to determine the effect of time on the indicators of thermo-oxidative stability.

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