The possibility of obtaining eco-safety surfactants and high-temperature dispersed phase of thixotropic plastic systems based on waste food oils were demonstrated. The structure of the synthesized fatty acid alkanolamides was confirmed by IR and 1H NMR spectroscopy. The upper temperature limit (above 463 К) for the use of synthesized fatty acids alkanolamides and complex calcium grease was determined by thermogravimetric analysis. The introduction of fatty acid alkanolamides to the high-temperature composition of grease improves its tribological, anti-oxidant and environmental characteris-tics.