TY JOUR TI Quality assessment engine oil and its replacement under actual state KW engine oil KW diagnostics KW properties motor oil KW additives JO Actual directions of scientific researches of the XXI century: theory and practice AU Timokhov, R.. AU Evdokimova, K.. AU Timokhova, O.M. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov