ASTM D6593-15a
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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 , 10/01/2015
Pages: 76
1.1This 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.
1.2The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard.
1.2.1Exception-Where there is no direct SI equivalent such as screw threads, national pipe threads/diameters, tubing size, or specified single source equipment.
1.3This 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 A5.
1.4A Table of Contents follows:
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Section |
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Scope |
1 |
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Referenced Documents |
2 |
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Terminology |
3 |
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Summary of Test Method |
4 |
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Significance and Use |
5 |
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Apparatus (General Description) |
6 |
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Apparatus (The Test Engine) |
7 |
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Sequence VG Test Engine |
7.1 |
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Required New Engine Parts |
7.2 |
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Reusable Engine Parts |
7.3 |
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Specially Fabricated Engine Parts |
7.4 |
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Special Engine Measurement and Assembly Equipment |
7.5 |
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Miscellaneous Engine Components-Preparation |
7.6 |
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Solvents and Cleaners Required |
7.7 |
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Assembling the Test Engine-Preparations |
7.8 |
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Assembling the Test Engine-Installations |
7.9 |
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Engine Installation on the Test Stand |
7.10 |
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Engine Fluids (Supply/Discharge Systems) |
8 |
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Intake Air |
8.1 |
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Fuel and Fuel System |
8.2 |
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Engine Oil and Engine Oil System |
8.3 |
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Coolants |
8.4 |
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Measurement Instrumentation |
9 |
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Temperatures |
9.1 |
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Pressures |
9.2 |
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Flow Rates |
9.3 |
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Fuel Consumption |
9.4 |
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Speed and Load |
9.5 |
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Exhaust Gas |
9.6 |
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Humidity |
9.7 |
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Miscellaneous Laboratory Equipment |
10 |
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Test Stand Calibration |
11 |
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Test Procedure |
12 |
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Pre-Test Procedure |
12.1 |
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Engine Operating Procedure |
12.2 |
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Periodic Measurements and Functions |
12.3 |
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Special Maintenance Procedures |
12.4 |
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Diagnostic Data Review |
12.5 |
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End of Test Procedure |
12.6 |
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Interpretation of Test Results |
13 |
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Parts Rating Area-Environment |
13.1 |
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Sludge Ratings |
13.2 |
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Varnish Ratings |
13.3 |
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Clogging |
13.4 |
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Sticking |
13.5 |
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Used Oil Analyses |
13.6 |
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Assessment of Test Validity |
14 |
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General |
14.1 |
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Used Oil Analyses-Interpretation |
14.2 |
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Blowby Flow Rate |
14.3 |
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Manifold Absolute Pressure |
14.4 |
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Fuel Consumption Rate |
14.5 |
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Oil Consumption |
14.6 |
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Engine Parts Replacement |
14.7 |
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Quality Index and Deviation Percentage |
14.8 |
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Final Test Report |
15 |
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Report Forms |
15.1 |
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Precision and Bias |
16 |
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Keywords |
17 |
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ANNEXES |
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ASTM Test Monitoring Center Organization |
Annex A1 |
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ASTM Test Monitoring Center: Calibration Procedures |
Annex A2 |
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ASTM Test Monitoring Center: Maintenance Activities |
Annex A3 |
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ASTM Test Monitoring Center: Related Information |
Annex A4 |
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Safety Precautions |
Annex A5 |
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Control and Data Acquisition Requirements |
Annex A6 |
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Detailed Specifications and Photographs of Apparatus |
Annex A7 |
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Special Service Tools for the Test Engine |
Annex A8 |
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Test Engine Part Number Listing |
Annex A9 |
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External Oil Heat Exchanger Cleaning Technique |
Annex A10 |
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Sequence VG Report Forms and Data Dictionary |
Annex A11 |
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Dipstick Calibration |
Annex A12 |
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Critical Part Supplier List |
Annex A13 |
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Operational Data Log-Engine Oil |
Annex A14 |
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Rating Worksheets |
Annex A15 |
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Fuel Injector Flow Measurements |
Annex A16 |
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APPENDIXES |
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Piston and Ring Measurements Record Forms |
Appendix X1 |
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Sources of Materials and Information |
Appendix X2 |
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Description of Scott Quarterly Gas Audit Service |
Appendix X3 |
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