Changes in service properties due to the aging of motor oils are related to the accumulation of oxidation products. In the deep stages of oxidation, these products consist mainly of resinous and asphaltenic compounds. The composition and properties of the products from severe oxidation of motor oils represent a major factor in determining the properties of the oil after long-term operation. This paper presents results from an investigation of the resinous and asphaltenic products from Ds-11 oil without additive and with 1.2% DF-11 additive (zinc dialkylphenyldithiophosphate) after testing for thermal-oxidative stability at 165 C in the presence of steel and copper springs, with oxygen passed through the oil over a 20-h or 50-h period. For comparison, data are presented on the composition and structure of the original resins present in the DS-11 oil before oxidation. Oxidation products were characterized by IR spectroscopy. Results are tabulated, plotted and evaluated.

  • Corporate Authors:

    Consultants Bureau

    227 West 17th Street
    New York, NY  United States  10011
  • Authors:
    • Sirenko, T M
    • Lebedevskaya, V G
    • Brodskii, E S
    • Trofimov, G A
    • Talisman, E L
  • Publication Date: 1978-3

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Filing Info

  • Accession Number: 00190075
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Apr 25 1979 12:00AM