Abstract: The tribotechnical lubricant and lubricant composition may be used for friction decrease in friction units of machinery and equipments included heavy-loaded ones in aging and operation process. The tribotechnical lubricant contains x-ray amorphous carbon characterized by particle size by electron microscopy of 30 50 nm, temperature of oxidation beginning in air is not more than 300° C., nonconjugated double bonds concentration determinated on interaction with neutral potassium permanganate solution is not less than one per 5 carbon atoms, paramagnetic centers concentration on ESR-line with g factor 2,022 is not less than one per 1200 carbon atoms. The lubricant composition contains a base oil and x-ray amorphous carbon.