ASTM D6593 - 14a

    Standard Test Method for Evaluation of Automotive Engine Oils for Inhibition of Deposit Formation in a Spark-Ignition Internal Combustion Engine Fueled with Gasoline and Operated Under Low-Temperature, Light-Duty Conditions

    Active Standard ASTM D6593 | Developed by Subcommittee: D02.B0.01

    Book of Standards Volume: 05.03


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    Significance and Use

    5.1 This test method is used to evaluate an automotive engine oil's control of engine deposits under operating conditions deliberately selected to accelerate deposit formation. This test method was correlated with field service data, determined from side-by-side comparisons of two or more oils in police, taxi fleets, and delivery van services. The same field service oils were then used in developing the operating conditions of this test procedure.

    FIG. 1 Schematic of Engine Fuel System

    Schematic of Engine Fuel System

    5.2 This test method, along with other test methods, defines the minimum performance level of the API Category SL (detailed information about this category is included in Specification D4485). This test method is also incorporated in automobile manufacturers' factory-fill specifications.

    5.3 The basic engine used in this test method is representative of many that are in modern automobiles. This factor, along with the accelerated operating conditions, should be considered when interpreting test results.

    1. Scope

    1.1 This test method covers and is commonly referred to as the Sequence VG test,2 and it has been correlated with vehicles used in stop-and-go service prior to 1996, particularly with regard to sludge and varnish formation.3 It is one of the test methods required to evaluate oils intended to satisfy the API SL performance category.

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

    1.2.1 Exception—Where there is no direct SI equivalent such as screw threads, national pipe threads/diameters, tubing size, or specified single source equipment.

    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 hazard statements are given in 7.7, 7.10.2.2, 8.3.4.2, 8.4.4.3, 9.2.6, 9.3.4.5, 12.1.1.7, 12.2.1.4, and Annex A1.

    1.4 A Table of Contents follows:

     

    Section

    Scope

    1

    Referenced Documents

    2

    Terminology

    3

    Summary of Test Method

    4

    Significance and Use

    5

    Apparatus (General Description)

    6

    Apparatus (The Test Engine)

    7

     

    Sequence VG Test Engine

    7.1

     

    Required New Engine Parts

    7.2

     

    Reusable Engine Parts

    7.3

     

    Specially Fabricated Engine Parts

    7.4

     

    Special Engine Measurement and Assembly Equipment

    7.5

     

    Miscellaneous Engine Components-Preparation

    7.6

     

    Solvents and Cleaners Required

    7.7

     

    Assembling the Test Engine-Preparations

    7.8

     

    Assembling the Test Engine-Installations

    7.9

     

    Engine Installation on the Test Stand

    7.10

    Engine Fluids (Supply/Discharge Systems)

    8

     

    Intake Air

    8.1

     

    Fuel and Fuel System

    8.2

     

    Engine Oil and Engine Oil System

    8.3

     

    Coolants

    8.4

    Measurement Instrumentation

    9

     

    Temperatures

    9.1

     

    Pressures

    9.2

     

    Flow Rates

    9.3

     

    Fuel Consumption

    9.4

     

    Speed and Load

    9.5

     

    Exhaust Gas

    9.6

     

    Humidity

    9.7

    Miscellaneous Laboratory Equipment

    10

    Test Stand Calibration

    11

    Test Procedure

    12

     

    Pre-Test Procedure

    12.1

     

    Engine Operating Procedure

    12.2

     

    Periodic Measurements and Functions

    12.3

     

    Special Maintenance Procedures

    12.4

     

    Diagnostic Data Review

    12.5

     

    End of Test Procedure

    12.6

    Interpretation of Test Results

    13

     

    Parts Rating Area-Environment

    13.1

     

    Sludge Ratings

    13.2

     

    Varnish Ratings

    13.3

     

    Clogging

    13.4

     

    Sticking

    13.5

     

    Used Oil Analyses

    13.6

     

    Additional Measurements

    13.7

    Assessment of Test Validity

    14

     

    General

    14.1

     

    Used Oil Analyses-Interpretation

    14.2

     

    Blowby Flow Rate

    14.3

     

    Manifold Absolute Pressure

    14.4

     

    Fuel Consumption Rate

    14.5

     

    Oil Consumption

    14.6

     

    Engine Parts Replacement

    14.7

     

    Quality Index and Deviation Percentage

    14.8

    Final Test Report

    15

     

    Report Forms

    15.1

    Precision and Bias

    16

    Keywords

    17

    ANNEXES

     

     

    Safety Hazards

    Annex A1

     

    Control and Data Acquisition Requirements

    Annex A2

     

    Detailed Specifications and Photographs of Apparatus

    Annex A3

     

    Special Service Tools for the Test Engine

    Annex A4

     

    Test Engine Part Number Listing

    Annex A5

     

    External Oil Heat Exchanger Cleaning Technique

    Annex A6

     

    Sequence VG Report Forms and Data Dictionary

    Annex A7

     

    Dipstick Calibration

    Annex A8

     

    Critical Part Supplier List

    Annex A9

     

    Operational Data Log-Engine Oil

    Annex A10

     

    Rating Worksheets

    Annex A11

     

    Fuel Injector Flow Measurements

    Annex A12

    APPENDIXES

     

     

    Piston and Ring Measurements Record Forms

    Appendix X1

     

    Sources of Materials and Information

    Appendix X2

     

    Description of Scott Quarterly Gas Audit Service

    Appendix X3


    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

    D86 Test Method for Distillation of Petroleum Products at Atmospheric Pressure

    D235 Specification for Mineral Spirits (Petroleum Spirits) (Hydrocarbon Dry Cleaning Solvent)

    D287 Test Method for API Gravity of Crude Petroleum and Petroleum Products (Hydrometer Method)

    D323 Test Method for Vapor Pressure of Petroleum Products (Reid Method)

    D381 Test Method for Gum Content in Fuels by Jet Evaporation

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

    D525 Test Method for Oxidation Stability of Gasoline (Induction Period Method)

    D873 Test Method for Oxidation Stability of Aviation Fuels (Potential Residue Method)

    D1266 Test Method for Sulfur in Petroleum Products (Lamp Method)

    D1298 Test Method for Density, Relative Density, or API Gravity of Crude Petroleum and Liquid Petroleum Products by Hydrometer Method

    D2622 Test Method for Sulfur in Petroleum Products by Wavelength Dispersive X-ray Fluorescence Spectrometry

    D2789 Test Method for Hydrocarbon Types in Low Olefinic Gasoline by Mass Spectrometry

    D3237 Test Method for Lead in Gasoline by Atomic Absorption Spectroscopy

    D3525 Test Method for Gasoline Diluent in Used Gasoline Engine Oils by Gas Chromatography

    D4057 Practice for Manual Sampling of Petroleum and Petroleum Products

    D4175 Terminology Relating to Petroleum, Petroleum Products, and Lubricants

    D4294 Test Method for Sulfur in Petroleum and Petroleum Products by Energy Dispersive X-ray Fluorescence Spectrometry

    D4485 Specification for Performance of Active API Service Category Engine Oils

    D5059 Test Methods for Lead in Gasoline by X-Ray Spectroscopy

    D5185 Test Method for Multielement Determination of Used and Unused Lubricating Oils and Base Oils by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES)

    D5862 Test Method for Evaluation of Engine Oils in Two-Stroke Cycle Turbo-Supercharged 6V92TA Diesel Engine

    D6304 Test Method for Determination of Water in Petroleum Products, Lubricating Oils, and Additives by Coulometric Karl Fischer Titration

    D7422 Test Method for Evaluation of Diesel Engine Oils in T-12 Exhaust Gas Recirculation Diesel Engine

    G40 Terminology Relating to Wear and Erosion

    ANSI Standard

    ANSIMC96.1 Temperature Measurement-Thermocouples

    Other ASTM Documents

    ASTMDepositRatingMan (Formerly CRC Manual 20) For stock #TMCMNL20, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org.


    ICS Code

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

    UNSPSC Code

    UNSPSC Code 15121501(Engine oil); 26101500(Engines)


    Referencing This Standard

    DOI: 10.1520/D6593-14A

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM D6593-14a, Standard Test Method for Evaluation of Automotive Engine Oils for Inhibition of Deposit Formation in a Spark-Ignition Internal Combustion Engine Fueled with Gasoline and Operated Under Low-Temperature, Light-Duty Conditions, ASTM International, West Conshohocken, PA, 2014, www.astm.org

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