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ASTM D4684-02a

Historical Revision

Standard Test Method for Determination of Yield Stress and Apparent Viscosity of Engine Oils at Low Temperature

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1.1 This test method covers the measurement of the yield stress and viscosity of engine oils after cooling at controlled rates over a period exceeding 45 h to a final test temperature between -10 and -40°C. The viscosity measurements are made at a shear stress of 525 Pa over a shear rate of 0.4 to 15 s-1.

1.2 This test method is applicable for unused oils, sometimes referred to as fresh oils, designed for both light duty and heavy duty engine applications. It also has been shown to be suitable for used diesel oils. The applicability to petroleum products other than engine oils has not been determined.

1.3 This test method uses the millipascal second (mPa·s) as the unit of viscosity. For information, the equivalent centipoise unit is shown in parentheses.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


SDO ASTM: ASTM International
Document Number D4684
Publication Date Nov. 10, 2002
Language en - English
Page Count 9
Revision Level 02a
Supercedes
Committee D02.07
Publish Date Document Id Type View
Nov. 1, 2020 D4684-20A Revision
June 1, 2020 D4684-20 Revision
June 1, 2018 D4684-18 Revision
Dec. 1, 2017 D4684-17A Revision
May 1, 2017 D4684-17 Revision
July 1, 2014 D4684-14 Revision
Dec. 1, 2012 D4684-12 Revision
Dec. 1, 2008 D4684-08 Revision
Jan. 15, 2007 D4684-07E01 Revision
Jan. 15, 2007 D4684-07 Revision
Nov. 10, 2002 D4684-02A Revision
Aug. 10, 2002 D4684-02 Revision
April 4, 2000 D4684-99E01 Revision