A TEST PROCEDURE FOR EVALUATING TEMPORARY-SHEAR LOSS OF ENGINE LUBRICANTS

Temporary shear loss characteristics of multigraded engine oils were measured in a newly developed engine oil pump rig. Correlations of the results with high pressure capillary viscometry data indicate that the test apparatus generates shear rates in the range of 2--3 X 10 to the 5th power s to the minus one power. One advantage of this technique over similar mechanical approaches is that the test rig causes virtually no permanent shear degradation. Test results are reported for a variety of polymer types, and the relationship of permanent and temporary shear losses is discussed. /GMRL/

  • Corporate Authors:

    Society of Automotive Engineers

    400 Commonwealth Drive
    Warrendale, PA  USA  15096
  • Authors:
    • Stambaugh, R L
    • Kopko, R J
  • Publication Date: 1975-2

Media Info

  • Pagination: 11 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00099223
  • Record Type: Publication
  • Report/Paper Numbers: SAE #750379
  • Files: TRIS
  • Created Date: Nov 5 1975 12:00AM