Seven current-production automobiles were used in a fleet study to determine the long-term effects and end-use influences of using 10% methanol/90% gasoline blends as automotive fuels. The vehicles were operated over a course designed to accumulate mileage at a rate and duty cycle similar to automobiles used by the private sector in the US. Vehicle tests were run at each 5000-mile accumulation interval to determine the fuel economy and the mass of pollutant emissions generated by the vehicles operating on the 10% methanol blend and to establish a basis for comparison on an unleaded, low-octane Indolene. These data showed an average reduction in volumetric fuel economy (approximately 5%) and a consistent reduction in carbon monoxide emissions associated with the use of the 10% methanol blend. At the end of 50,000 miles of operation on the blend, the engine and fuel handling systems in four of the vehicles were disassembled for inspection and rating to identify any significant wear or materials incompatibility problems associated with long-term operation on the methanol blend. Crankcase lubricants were changed at 5000-mile intervals. Subsequent analyses of the used lubricants did not reveal any significant abnormalities that would indicate an adverse fuel/lubricant interaction. Two of the vehicles were used in Sealed Housing for Evaporative Determination tests using low-octane Indolene and a 10% methanol/90% Indolene blend. The data from these tests showed a significant increase in evaporative emissions associated with short-term use of the methanol blends and an even greater increase when the methanol blend is used for extended periods. (ERA citation 06:007896)

  • Supplemental Notes:
    • International symposium on alcohol fuels technology, Sao Paulo, Brazil, 5 Oct 1980.
  • Corporate Authors:

    Bartlesville Energy Technology Center

    Bartlesville, OK  United States 

    Department of Energy

    1000 Independence Avenue, SW
    Washington, DC  United States  20585
  • Authors:
    • Stamper, K R
  • Publication Date: 1980

Media Info

  • Pagination: 10 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00336915
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Files: TRIS
  • Created Date: Jun 12 1981 12:00AM