Reduced coolant temperature studies showed an average decrease in ORI of about two units in two popular make engines and no effect in a third make. Coolant temperature had on significant effect on exhaust emissions from any of the engines tested. Tests conducted on gasoline "tail" end properties showed that gasoline endpoint had no effect on ORI, while an increase in polycyclic nuclear aromatics increased it. A managanse antiknock additive reduced ORI in one make engine. Lube oil metal additive type and type of viscosity index (VI) improver affected ORI whereas, sulfated ash content did not affect it. /GMRL/

Media Info

  • Pagination: 41 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00158402
  • Record Type: Publication
  • Report/Paper Numbers: SAE 770195
  • Files: TRIS
  • Created Date: Dec 8 1977 12:00AM