Tests conducted with cars showed that ORI with unleaded gasolines is about two units higher than with leaded gasolines and that coolant system degradation had little or no effect. Studies conducted in the laboratory showed that oil consumption rate, oil multi-grade range, fuel detergent additives, and collant temperature all affected ORI to some degree. Oil ash level and a manganese antiknock additive had no effect. Combustion chamber deposits studies showed that a good correlation exists between ORI and the ratio of carbon to metals in the deposits. /GMRL/

  • Supplemental Notes:
    • From Inter-Industry emission control program 2.
  • Corporate Authors:

    Society of Automotive Engineers (SAE)

    400 Commonwealth Drive
    Warrendale, PA  United States  15096
  • Authors:
    • Keller, B D
    • Meguerian, G H
  • Publication Date: 1976-2

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00145030
  • Record Type: Publication
  • Report/Paper Numbers: SAE #760195
  • Files: TRIS
  • Created Date: Feb 1 1977 12:00AM