The results are presented of a study in which octane requirement increase (ORI) was determined for 62 1984 model cars and trucks operated on unleaded gasoline. The data base consists of information volunteered by participants. All ORI values were determined from the increase in maximum octane requirements irrespective of whether requirements were obtained at full- or part-throttle. At 15,000 miles, the mean ORI for all vehicles with full-boiling range unleaded (FBRU) fuels was 4.0 Research octane numbers, 2.6 Motor octane numbers, and 3.3 (R plus M)/2 numbers. These and other findings are discussed.

  • Corporate Authors:

    Coordinating Research Council, Incorporated

    219 Perimeter Center Parkway
    Atlanta, GA  United States  30346
  • Publication Date: 1986-10

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: v.p.

Subject/Index Terms

Filing Info

  • Accession Number: 00495903
  • Record Type: Publication
  • Source Agency: National Highway Traffic Safety Administration
  • Report/Paper Numbers: CRC Rpt No. 549, HS-039 694
  • Files: HSL, USDOT
  • Created Date: Aug 31 1990 12:00AM