A STUDY OF OIL AND FILTER CHANGE PERIODS AND ENGINE OIL MONITORING FOR GM 6V-71 DIESEL BUS ENGINES

Thirteen new 1965 buses having GM 6V-71 diesel engines were put on various oil/filter change periods from 6000/6000 to 25000/25000 miles, and operated in normal passenger service for seven years (1966-1973) to determine the optimum oil/filter change interval. Crankcase oil was tested periodically, and oil filters were examined after scheduled removal. Maintenance and operation records were kept. Finally, at the overhaul point, some engine parts were examined. The optimum oil/filter change period was judged to be 25000/125000 miles, in conjunction with field testing for solids load, water and dilution. Oil change periods greater than 25000 miles may be possible in view of the levelling off effect of contaminants in an that burns a relatively fixed amount of oil. Filter change periods, however, should not be increased. Because three oil types were used in all test engines, conclusions regarding the acceptability of any one type of oil are tenuous.

  • Supplemental Notes:
    • Presented at the SAE Congress and Exposition, Detroit, 27 February-3 March 1978.
  • Corporate Authors:

    Society of Automotive Engineers (SAE)

    400 Commonwealth Drive
    Warrendale, PA  United States  15096
  • Authors:
    • Strigner, P L
    • Kallio, N N
  • Publication Date: 1978

Media Info

  • Features: References;
  • Pagination: 20 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00395167
  • Record Type: Publication
  • Source Agency: National Highway Traffic Safety Administration
  • Report/Paper Numbers: SAE 780184, HS-025 331U
  • Files: HSL, USDOT
  • Created Date: Jun 30 1985 12:00AM