ASTM D4684 Standard Test Method for Determination of Yield Stress and Apparent Viscosity of Engine Oils at Low Temperature-- eLearning Course

    Price: $174

    About the Series

    ASTM's Petroleum Lab Technician Series enables lab technicians to improve their skills through industry-leading, self-guided online training. The eLearning courses are a key tool to supplement existing internal lab QA/QC programs.

    Each course includes:
    • Self-guided training complete with video demonstrations, checklists, concept presentations, data sheets and glossaries
    • Quiz with automatic grading
    • Certificate upon successful completion of course and passing score on the quiz.

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    All ASTM online courses are available by subscription on ASTM's Training Center. The Training Center provides advanced features that let you set up learning plans, track learning progress and compliance, and run reports.

    About the Course

    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 C and -40 C. The precision is stated for test temperatures from -40 C to -15 C. The viscosity measurements are made at a shear stress of 525 Pa over a shear rate of 0.4 s-1 to 15 s-1. 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.

    The course can be completed in approximately one hour.

    Learning Outcomes

    By the end of this course, you will be able to:

    • Identify apparatus and related components used in determination of yield stress and apparent viscosity of engine oils at low temperature, including temperature measuring device requirements
    • Recognize reagents and materials used in this test method, including low cloud-point Newtonian oil
    • Recognize sampling requirements as outlined in ASTM D4684
    • Recall calibration and standardization requirements for Procedure A
    • Recall yield stress and viscosity measurement requirements for Procedure A, including cell preparation and measurement of both yield stress and apparent viscosity
    • Identify calculation procedures for yield stress and apparent viscosity as outlined in Procedure A
    • Recognize reporting procedures for yield stress and apparent viscosity as outlined for Procedure A


    Anyone who runs the D4684 test method or who needs an understanding of the test method and how it is properly run.

    Course Content

    • Introduction
    • Demonstration Video
    • Procedural Outlines
    • Glossary
    • Quiz
    • Referenced Materials
    • Certificate


    • 11.1 Procedure (Duration: 1:40 min)

    CEUs and Certificate

    CEUs: .1

    Certificate: A certificate is available upon successful completion of the course and an 80% or higher score on the exam.

    Reference Materials Included

    ASTM D4684

    Certificate Program

    This training course is part of the following certificate program(s):


    1 year online subscription for a Single-User Only via username/password. Requires internet access.

    For pricing for Multi-User access or for more information, please contact sales here or call 1-877-909-ASTM.

    Technology Requirements

    For a list of technology requirements for accessing ASTM Training please click here.

    Stock #


    Price: $174