The Penn State Microoxidation Tester coupled with gel permeation chromatography and clay column adsorption techniques has been demonstrated to be an effective tool to provide semi-quantitative analysis for automotive crankcase lubricant deterioration. This test simulates engine piston-cylinder zone high-temperature thin-film conditions. Oxidative behavior of a series of ASTM Sequence IIID hot engine test reference oils (with unknown base stocks and additive package) has been found to be comparable to and consistent with that of a model fluid formulated with a good quality conventionally refined heavy neutral and a simple additive system composed of phenyl alpha naphthylamine and zinc dialkyldithiophosphate. Further simplification of the test procedure for evaluating varnish and deposit formation tendencies proves to be an effective aid in discriminating base oils as well as compounded fluids with a minimum of analytical equipment. High temperature evaluations of a number of commercial multigrade engine oils reveal the slight advantage of synthetic over conventional mineral base oils both in terms of oxidation resistance and volatility loss.

  • Availability:
  • Supplemental Notes:
    • Reprinted from SP-558 Lubricant and Additive Effects on Engine Wear. Fuels and Lubricants Meeting San Francisco, California, October 31-November 3, 1983.
  • Corporate Authors:

    Society of Automotive Engineers (SAE)

    400 Commonwealth Drive
    Warrendale, PA  United States  15096
  • Authors:
    • Cho, L F
    • Klaus, E E
  • Publication Date: 1983

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00387285
  • Record Type: Publication
  • Source Agency: National Highway Traffic Safety Administration
  • Report/Paper Numbers: SAE 831679 Reprint, HS-036 778
  • Files: HSL, USDOT
  • Created Date: Jul 30 1984 12:00AM