The effects of selected fuel additivies, engine operating conditions, and driving modes on ORI have been investigated for the 1975 Ford 400 CID engine. Reduced coolant temperatures significantly lowered ORI. Methanol appears to reduce ORI. Variables which do not produce strong trends are increased air-fuel ratio, a driving cycle with wide open throttle accelerations, a fuel with a carrier oil additive, and heavier fuels. An inverse relationship between initial octane requirements and ORI was observed. /GMRL/

  • Corporate Authors:

    Society of Automotive Engineers (SAE)

    400 Commonwealth Drive
    Warrendale, PA  United States  15096
  • Authors:
    • Saillant, R B
    • Pedrys, F J
    • Kidder, H E
  • Publication Date: 1976-2

Media Info

  • Pagination: 8 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00139750
  • Record Type: Publication
  • Report/Paper Numbers: SAE #760196
  • Files: TRIS
  • Created Date: Oct 6 1976 12:00AM