THE LUBRICATING PROPERTIES OF USED ENGINE OIL

The lubricating properties of oil samples from four cars using either leaded or unleaded gasoline were examined using a cross-pin-type lubricant tester and a JIS four-ball tester. The zinc dialkyldithiophosphate (ZnDTP) content in the oil samples was determined by thin layer chromatography (TLC). The wear scar diameter increase with running distance up to 2000 km. At running distances above 2000 km, the wear scar diameter decreased for oil from cars using unleaded gasoline but increased for oil from cars using leaded gasoline. The load-carrying capacity also varied depending on the type of fuel used. The TLC spot characteristic of ZnDTP disappeared after running distances of 3000 km with both fuels. However, another spot, characteristic of lead dialkyldithiophosphate (PbDTP), appeared below the ZnDTP spot for oil from cars using leaded gasoline. These results indicate that the differences in the lubricating properties of oils from cars using leaded and unleaded gasoline are due to the formation of PbDTP.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00431648
• Corporate Authors:

  Elsevier Science S.A.

  P.O. Box 564
  CH-1001 Lausanne 1,   Switzerland 
• Authors:
  • Kawamura, M
  • FUJITA, K
  • NINOMIYA, K
• Publication Date: 1982-4

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 195-202
• Serial:
  • Wear
  • Volume: 77
  • Publisher: Elsevier Science S.A.
  • ISSN: 0043-1648

Subject/Index Terms

• TRT Terms: Engine oils; Leaded gasoline; Lubricating oils; Properties of materials; Unleaded gasoline; Wear
• Subject Areas: Geotechnology; Highways; Materials; Vehicles and Equipment; I35: Miscellaneous Materials; I95: Vehicle Inspection;

Filing Info

• Accession Number: 00367987
• Record Type: Publication
• Source Agency: National Highway Traffic Safety Administration
• Report/Paper Numbers: HS-033 267
• Files: HSL, TRIS, USDOT
• Created Date: Oct 30 1982 12:00AM