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ASTM D 4684 : 2007 : EDT 1

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Standard Test Method for Determination of Yield Stress and Apparent Viscosity of Engine Oils at Low Temperature
Available format(s)

Hardcopy , PDF

Superseded date

11-11-2014

Language(s)

English

Published date

31-12-2010

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 s1. The viscosity as measured at this shear stress was found to produce the best correlation between the temperature at which the viscosity reached a critical value and borderline pumping failure temperature in engines.

1.2 Procedure A of this test method has precision stated for a yield range from less than 35 Pa to 210 Pa and apparent viscosity range from 4300 to 270 000 mPa·s. The test procedure can determine higher yield stress and viscosity levels.

1.3 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 and gasoline engine oils. The applicability to petroleum products other than engine oils has not been determined.

1.4 This test method uses the milliPascal second (mPa·s) as the unit of viscosity. For information, the equivalent unit, centiPoise (cP), is shown in parentheses.

1.5 This test method contain two procedures: Procedure A incorporates several equipment and procedural modifications from Test Method D 468402 that have shown to improve the precision of the test, while Procedure B is unchanged from Test Method D 468402. Additionally, Procedure A applies to those instruments that utilize thermoelectric cooling technology and those that use indirect refrigeration technology of recent manufacture for instrument temperature control. Procedure B can use the same instruments used in Procedure A or those cooled by circulating methanol.

1.6 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.

Committee
D 02
DocumentType
Test Method
Pages
13
PublisherName
American Society for Testing and Materials
Status
Superseded
SupersededBy
Supersedes

ASTM D 8164 : 2019 Standard Guide for Digital Contact Thermometers for Petroleum Products, Liquid Fuels, and Lubricant Testing
ASTM D 7110 : 2015 Standard Test Method for Determining the Viscosity-Temperature Relationship of Used and Soot-Containing Engine Oils at Low Temperatures
ASTM D 6821 : 2018 Standard Test Method for Low Temperature Viscosity of Drive Line Lubricants in a Constant Shear Stress Viscometer
ASTM D 5133 : 2015 Standard Test Method for Low Temperature, Low Shear Rate, Viscosity/Temperature Dependence of Lubricating Oils Using a Temperature-Scanning Technique
ASTM D 7528 : 2017 : REV A Standard Test Method for Bench Oxidation of Engine Oils by ROBO Apparatus
ASTM D 6896 : 2018 Standard Test Method for Determination of Yield Stress and Apparent Viscosity of Used Engine Oils at Low Temperature
ASTM D 8111 : 2019 Standard Test Method for Evaluation of Automotive Engine Oils in the Sequence IIIH, Spark-Ignition Engine

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