ASTM D6593-17

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

Información:

Fecha:

2018-10-29 /Historical

Superseeded by:

D6593-18

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.

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.

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 A5.

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
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
	ASTM Test Monitoring Center Organization	Annex A1
	ASTM Test Monitoring Center: Calibration Procedures	Annex A2
	ASTM Test Monitoring Center: Maintenance Activities	Annex A3
	ASTM Test Monitoring Center: Related Information	Annex A4
	Safety Precautions	Annex A5
	Control and Data Acquisition Requirements	Annex A6
	Detailed Specifications and Photographs of Apparatus	Annex A7
	Special Service Tools for the Test Engine	Annex A8
	Test Engine Part Number Listing	Annex A9
	External Oil Heat Exchanger Cleaning Technique	Annex A10
	Sequence VG Report Forms and Data Dictionary	Annex A11
	Dipstick Calibration	Annex A12
	Critical Part Supplier List	Annex A13
	Operational Data Log-Engine Oil	Annex A14
	Rating Worksheets	Annex A15
	Fuel Injector Flow Measurements	Annex A16
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

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.

Keywords:

lubricating oils; Sequence VG; sludge and varnish; spark-ignition automotive engine; stop-and-go service;

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