TY JOUR TI REDUCING THE WEAR OF MACHINE PARTS BY IMPROVING OPERATIONAL PROPERTIES OF MOTOR VEHICLES KW oil KW wear KW viscosity KW friction factor KW properties KW wear products KW composition KW oil KW tribology JO Transport engineering AU Shets, S.P. AU Cheslavsky, L.V. PY 2025 IS 2025 PB Bryansk State Technical University