TY JOUR TI THE INFLUENCE OF EXTERNAL FACTORS ON THE FREQUENCY ANALYSIS CAR ENGINE OIL KW engine oil analysis KW diagnostics. JO Alternative energy sources in the transport-technological complex: problems and prospects of rational use of AU Aksenov, A.. AU Tretyakov, A.I. AU Golev, A.. PY 2015 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov