A method based on apparent viscosity of engine oils at 0 degrees F measured by the cold cranking simulator to estimate minimum starting temperatures for SAE "W" numbered engine oils is described. Based on apparent viscosity measurements, a nonpolymer-containing SAE 20W-30 engine oil would satisfy 100% of gasoline or diesel engine powered fleets where temperatures are consistently above 0 degrees F. Based on climate and vehicle distribution by geographical location, about 15% of gasoline engine powered vehicles require engine oils with low-temperature properties found in SAE 5W or SAE 10W engine oils. Diesel engines using a nonpolymer-containing SAE 20W-30 engine oil would obtain the benefits of SAE 20W low-temperature starting properties and SAE 30 high-temperature protection. /GMRL/

  • Corporate Authors:

    Society of Automotive Engineers (SAE)

    400 Commonwealth Drive
    Warrendale, PA  United States  15096
  • Authors:
    • Mullen, T R
    • Lendener, W J
    • Frino, M J
  • Publication Date: 1974-6

Media Info

  • Pagination: 12 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00096093
  • Record Type: Publication
  • Report/Paper Numbers: SAE Paper No 740524
  • Files: TRIS
  • Created Date: Aug 13 1975 12:00AM