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

SCOPE
1.1 This test method is commonly referred to as the Sequence VG test² and 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 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 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:
SectionScope1Referenced Documents2ASTM Standards2.1SAE Standards3.2.3ANSI Standard2.2Terminology3Definitions3.1Definitions of Terms Specific to This Standard3.2Summary of Test Method4Significance and Use5Apparatus-General Description6Apparatus-The Test Engine7Sequence VG Test Engine7.1Required New Engine Parts7.2Reusable Engine Parts7.3Specially Fabricated Engine Parts7.4Special Engine Measurement and Assembly Equipment7.5Miscellaneous Engine Components-Preparation7.6Solvents and Cleaners Required7.7Assembling the Test Engine-Preparations7.8Assembling the Test Engine-Installations7.9Engine Installation on the Test Stand7.10Engine Fluids-Supply/Discharge Systems8Intake Air8.1Fuel and Fuel System8.2Engine Oil and Engine Oil System8.3Coolants8.4Measurement Instrumentation9Temperatures9.1Pressures9.2Flow Rates9.3Fuel Consumption9.4Speed and Load9.5Exhaust Gas9.6Humidity9.7Miscellaneous Laboratory Equipment10Test Stand Calibration11Test Procedure12Pre-Test Procedure12.1Engine Operating Procedure12.2Periodic Measurements and Functions12.3Special Maintenance Procedures12.4Diagnostic Data Review12.5End of Test Procedure12.6Interpretation of Test Results13Parts Rating Area-Environment13.1Sludge Ratings13.2Varnish Ratings13.3Clogging13.4Sticking13.5Used Oil Analyses13.6Assessment of Test Validity14General14.1Average Exhaust Gas NOx Levels13.1.5Used Oil Analyses-Interpretation14.2Blowby Flow Rate14.3Manifold Absolute Pressure14.4Fuel Consumption Rate14.5Oil Consumption14.6Engine Parts Replacement14.7Quality Index and Deviation Percentage14.8Final Test Report15Report Forms15.1Photographs15.2Precision and Bias16Keywords17ANNEXES Safety PrecautionsAnnex A1Control and Data Acquisition RequirementsAnnex A2Detailed Specifications and Photographs of ApparatusAnnex A3Special Service Tools for the Test EngineAnnex A4Test Engine Part Number ListingAnnex A5External Oil Heat Exchanger Cleaning TechniqueAnnex A6Sequence VG Report Forms and Data DictionaryAnnex A7Dipstick CalibrationAnnex A8Critical Part Supplier ListAnnex A9Operational Data Log-Engine OilAnnex A10Rating WorksheetsAnnex A11Fuel Injector Flow MeasurementsAnnex A12APPENDIXESPiston and Ring Measurements Record FormsAppendix X1Sources of Materials and InformationAppendix X2Description of Scott Quarterly Gas Audit ServiceAppendix X3

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ASTM D6593-04 - 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
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
An American National Standard
Designation: D 6593 – 04X
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-
1
Temperature, Light-Duty Conditions
This standard is issued under the fixed designation D 6593; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope
Assembling the Test Engine-Preparations 7.8
Assembling the Test Engine-Installations 7.9
1.1 This test method is commonly referred to as the Se-
Engine Installation on the Test Stand 7.10
2
quence VG test and has been correlated with vehicles used in
Engine Fluids (Supply/Discharge Systems) 8
Intake Air 8.1
stop-and-go service prior to 1996, particularly with regard to
Fuel and Fuel System 8.2
3
sludge and varnish formation. It is one of the test methods
Engine Oil and Engine Oil System 8.3
required to evaluate oils intended to satisfy the API SL
Coolants 8.4
Measurement Instrumentation 9
performance category.
Temperatures 9.1
1.2 The values stated in SI units are to be regarded as
Pressures 9.2
standard. Flow Rates 9.3
Fuel Consumption 9.4
1.3 This standard does not purport to address all of the
Speed and Load 9.5
safety concerns, if any, associated with its use. It is the
Exhaust Gas 9.6
responsibility of the user of this standard to establish appro- Humidity 9.7
Miscellaneous Laboratory Equipment 10
priate safety and health practices and determine the applica-
Test Stand Calibration 11
bility of regulatory limitations prior to use. Specific hazard
Test Procedure 12
statements are given in 7.7, 7.10.2.2, 8.3.4.2, 8.4.4.3, 9.2.6, Pre-Test Procedure 12.1
Engine Operating Procedure 12.2
9.3.4.5, 12.1.1.7, 12.2.1.4, and Annex A1.
Periodic Measurements and Functions 12.3
1.4 A Table of Contents follows:
Special Maintenance Procedures 12.4
Diagnostic Data Review 12.5
Section
End of Test Procedure 12.6
Scope 1
Interpretation of Test Results 13
Referenced Documents 2
Parts Rating Area-Environment 13.1
Terminology 3
Sludge Ratings 13.2
Summary of Test Method 4
Varnish Ratings 13.3
Significance and Use 5
Clogging 13.4
Apparatus (General Description) 6
Sticking 13.5
Apparatus (The Test Engine) 7
Used Oil Analyses 13.6
Sequence VG Test Engine 7.1
Assessment of Test Validity 14
Required New Engine Parts 7.2
General 14.1
Reusable Engine Parts 7.3
Used Oil Analyses-Interpretation 14.2
Specially Fabricated Engine Parts 7.4
Blowby Flow Rate 14.3
Special Engine Measurement and Assembly Equipment 7.5
Manifold Absolute Pressure 14.4
Miscellaneous Engine Components-Preparation 7.6
Fuel Consumption Rate 14.5
Solvents and Cleaners Required 7.7
Oil Consumption 14.6
Engine Parts Replacement 14.7
Quality Index and Deviation Percentage 14.8
1
Final Test Report 15
This test method is under the jurisdiction of ASTM Committee D02 on
Report Forms 15.1
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
Precision and Bias 16
D02.B0 on Automotive Lubricants.
Keywords 17
Current edition approved XXXX. Published XXXX. Originally approved in
ANNEXES
2000. Last previous edition approved in 2004 as D 6593–04.
2 Safety Precautions Annex A1
Until the next revision of this test method, the ASTM Test Monitoring Center
Control and Data Acquisition Requirements Annex A2
will update changes in the test method by means of information letters. Information
Detailed Specifications and Photographs of Apparatus Annex A3
letters may be obtained from the ASTM Test Monitoring Center, 6555 Penn Ave.,
Special Service Tools for the Test Engine Annex A4
Pittsburgh, PA 15206-4489. Attention: Administrator. This edition incorporates
Test Engine Part Number Listing Annex A5
revisions in all information Letters through No. 04–1.
External Oil Heat Exchanger Cleaning Technique Annex A6
3
Supporting data have been filed at ASTM International Headquarters and may
Sequence VG Report Forms and Data Dictionary Annex A7
be obtained by requesting Research Report RR: D02–1472.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D 6593 – 04X
ments, Wear Metals, and Contaminants in Used Lubricat-
Dipstick Calibration Annex A8
Critical Part Supplier List Annex A9
ing Oils and Determination of Selected Elements in Base
Operational Data Log-Engine Oil Annex A10
Oils by Inductively Coupled Plasma Atomic Emissions
Rating Worksheets Annex A11
Spectrometry (ICP-AES)
Fuel Injector Flow Measurements Annex A12
APPENDIXES
D 5302 Test Meth
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