Evaluation of the effectiveness of the developed package of additives PH-SL for engine oils for modern gasoline engines

A comparative evaluation of the experimental and imported additive packages in the composition of API SL/CF engine oil was carried out. It was found that the experimental package of PH-SL additives in the composition of engine oil has a stable colloidal structure, surpasses the imported package in terms of thermal oxidative stability and tendency to varnish formation and is on par with it in terms of tribological characteristics. During the monitoring of qualitative changes in the state of oxidized oils, including using the method of IR-Fourier spectrometry, it was found that oil with an experimental additive package has an advantage in changing the kinematic viscosity of oxidized oil and the degree of activation of detergent additives compared with oil containing an imported additive package. Based on the results of comparative tests on colloidal and operational properties, it was found that the experimental additive package is at the level of an imported analog. The effectiveness of the use of an experimental additive package instead of imported in the compositions of API SL/CF engine oils has been confirmed.