Low-viscosity engine oils with fuel economy properties can be made by using moderate amounts of olefin oligomers with standard mineral oil base stocks. Such oils minimize the problems of wear and high oil consumption often associated with low-viscosity all-mineral oils and can be formulated to meet all requirements. Tabulated data show results of comparative studies on volatility and viscosity of oligomers, hydrocarbons, and blends of the two. The addition of oligomers to hydrocarbon engine oils reduces both volatility and viscosity. A second approach to fuel economy via lubricant modification is the inclusion of an appropriate friction reducer. Field tests of this approach were made in two fleets of European cars; a 1.5% improvement in fuel economy was noted. It is concluded that the use of friction reducers in low-viscosity part-synthetic lubricants combines the benefits of both approaches to improved fuel economy and can be practical in commercial use.

  • Availability:
  • Supplemental Notes:
    • Presented at SAE Fuels and Lubricants Meeting, Houston, 1-4 October 1979.
  • Corporate Authors:

    Society of Automotive Engineers (SAE)

    400 Commonwealth Drive
    Warrendale, PA  United States  15096
  • Authors:
    • Papay, A G
    • Rifkin, E B
    • Shubkin, R L
    • Jackisch, P F
    • Dawson, R B
  • Publication Date: 1979

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00386860
  • Record Type: Publication
  • Source Agency: National Highway Traffic Safety Administration
  • Report/Paper Numbers: SAE 790947, HS-029 252U
  • Files: HSL, USDOT
  • Created Date: Jul 30 1984 12:00AM