ASTM D7528 - 17

    Standard Test Method for Bench Oxidation of Engine Oils by ROBO Apparatus

    Active Standard ASTM D7528 | Developed by Subcommittee: D02.B0.07

    Book of Standards Volume: 05.04

      Format Pages Price  
    PDF 21 $65.00   ADD TO CART
    Hardcopy (shipping and handling) 21 $65.00   ADD TO CART
    Standard + Redline PDF Bundle 42 $78.00   ADD TO CART

    Significance and Use

    5.1 This bench test method is intended to produce comparable oil aging characteristics to those obtained with ASTM TMC Sequence IIIGA matrix reference oils 434, 435 and 438 after aging in the Sequence IIIG engine test.

    5.2 To the extent that the method generates aged oils comparable to those from the Sequence IIIG engine test, the measured increases in kinematic and MRV viscosity indicate the tendency of an oil to thicken because of volatilization and oxidation, as in the Sequence IIIG and IIIGA (see Appendix X1 in Test Method D7320) engine tests, respectively.

    5.3 This bench test procedure has potential use in specifications and classifications of engine lubricating oils, such as Specification D4485.

    1. Scope

    1.1 This test method describes a bench procedure to simulate the oil aging encountered in Test Method D7320, the Sequence IIIG engine test method. These aged oils are then tested for kinematic viscosity and for low-temperature pumpability properties as described in the Sequence IIIGA engine test, Appendix X1 of Test Method D7320.

    1.2 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

    1.2.1 Exceptions—There are no SI equivalents for some apparatus in Section 6, and there are some figures where inch units are to be regarded as standard.

    1.3 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. Specific warning statements are given in Sections 7 and 8.

    1.4 This test method is arranged as follows:





    Reference Documents




    Summary of Test Method


    Significance and Use




    Reagents and Materials




    Reference Oil Testing and Test Stand Calibration






    Calculations and Determination of Test Results




    Precision and Bias






    Reaction Vessel

    Annex A1

    Reaction Vessel Head

    Annex A2

    Reaction Vessel-to-Head Seal

    Annex A3

    Agitator Turbine Blade

    Annex A4

    Agitator Packing Gland

    Annex A5

    Nitrogen Dioxide Graduated Tube

    Annex A6

    Vacuum System Plumbing

    Annex A7

    Vacuum Trap Condensers

    Annex A8

    Setting the Vacuum Control Valve

    Annex A9



    Sample Preparation and Addition

    Appendix X1

    Charging the Liquid Nitrogen Dioxide

    Appendix X2

    Nitrogen Dioxide Precision Needle Valve

    Appendix X3

    Example of an Assembled ROBO Apparatus

    Appendix X4

    Information Package to Aid Setting Up a New Robo Apparatus

    Appendix X5

    1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D445 Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)

    D4175 Terminology Relating to Petroleum, Petroleum Products, and Lubricants

    D4485 Specification for Performance of Active API Service Category Engine Oils

    D4684 Test Method for Determination of Yield Stress and Apparent Viscosity of Engine Oils at Low Temperature

    D5293 Test Method for Apparent Viscosity of Engine Oils and Base Stocks Between -5 and -35C Using Cold-Cranking Simulator

    D7320 Test Method for Evaluation of Automotive Engine Oils in the Sequence IIIG, Spark-Ignition Engine

    SAE Standard

    SAE J300 Engine Oil Viscosity Classification

    ICS Code

    ICS Number Code 75.100 (Lubricants, industrial oils and related products)

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/D7528-17

    Citation Format

    ASTM D7528-17, Standard Test Method for Bench Oxidation of Engine Oils by ROBO Apparatus, ASTM International, West Conshohocken, PA, 2017,

    Back to Top