FIELD SERVICE COMPATIBILITY OF ASHLESS AND FULLY COMPOUNDED ENGINE OILS WITH TWO BEAD-TYPE OXIDATION CATALYSTS

Eight catalytically equipped vehicles were used to compare the effects of an ashless, nonphosphorus lubricant and a conventional SE lubricant on the deterioration of two different types of bead catalyst operating in field service. Composite CO emissions (measured by the 1975 Federal Test Procedure) approximately doubled during the 25,000--mile test with both oils relative to the fresh catalyst. No significant increase in composite HC emissions was shown. Analysis of the aged catalyst showed average phosphorus contamination of 0.08 wt % with the conventional oil compared to 0.01 wt % with the ashless oil. /GMRL/

Media Info

  • Pagination: 10 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00099116
  • Record Type: Publication
  • Report/Paper Numbers: SAE #750448
  • Files: TRIS
  • Created Date: Oct 18 1975 12:00AM