In the 38th annual statistical survey of current model vehicles, test data were obtained on 407 1984 model vehicles, including 345 US vehicles and 62 imported vehicles. Eighteen laboratories participated in this survey. Maximum octane number requirements were determined by testing under part-throttle conditions, as well as at maximum-throttle. Requirements are expressed as the Research octane number, Motor octane number, and (R+M)/2 octane number of the reference fuel producing knock which was recurrent and repeatable at the lowest audible level. A new definition of borderline knock was used in this survey; this change may have affected the 1984 Survey results relative to previous years' Surveys. Estimated octane number requirements for the US vehicles are weighted in proportion to the 1984 vehicle model production figures and, or the imported models, in proportion to import sales volume in the United States.

  • Supplemental Notes:
    • Prepared by the 1984 Analysis Panel of the CRC Octane Number Requirement Survey Group.
  • Corporate Authors:

    Coordinating Research Council, Incorporated

    219 Perimeter Center Parkway
    Atlanta, GA  United States  30346
  • Publication Date: 1985-12

Media Info

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

Subject/Index Terms

Filing Info

  • Accession Number: 00495762
  • Record Type: Publication
  • Source Agency: National Highway Traffic Safety Administration
  • Report/Paper Numbers: CRC Report No. 544, HS-039 655
  • Files: HSL, USDOT
  • Created Date: Jul 31 1990 12:00AM