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 (SAE)

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

Media Info

• Pagination: 11 p.

Subject/Index Terms

• TRT Terms: Engine oils; Evaluation; Lubricants; Shear rate; Test procedures; Testing equipment
• Subject Areas: Geotechnology; Highways; Materials; Safety and Human Factors;

Filing Info

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