ASTM D6593-07a
(Test Method)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
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
SIGNIFICANCE AND USE
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.
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 D 4485). This test method is also incorporated in automobile manufacturers' factory-fill specifications.
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.
FIG. 1 Schematic of Engine Fuel System
SCOPE
1.1 This test method covers and is commonly referred to as the Sequence VG test, and it has been correlated with vehicles used in stop-and-go service prior to 1996, particularly with regard to sludge and varnish formation. 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. The values given in parentheses are for information only.
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.
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An American National Standard
Designation: D 6593 – 07a
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
Section
Scope 1
1.1 This test method covers and is commonly referred to as
Referenced Documents 2
2
the SequenceVG test, and it has been correlated with vehicles
Terminology 3
Summary of Test Method 4
used in stop-and-go service prior to 1996, particularly with
Significance and Use 5
3
regard to sludge and varnish formation. It is one of the test
Apparatus (General Description) 6
methods required to evaluate oils intended to satisfy the API
Apparatus (The Test Engine) 7
Sequence VG Test Engine 7.1
SL performance category.
Required New Engine Parts 7.2
1.2 The values stated in SI units are to be regarded as the
Reusable Engine Parts 7.3
standard. The values given in parentheses are for information Specially Fabricated Engine Parts 7.4
Special Engine Measurement and Assembly Equipment 7.5
only.
Miscellaneous Engine Components-Preparation 7.6
1.3 This standard does not purport to address all of the
Solvents and Cleaners Required 7.7
safety concerns, if any, associated with its use. It is the Assembling the Test Engine-Preparations 7.8
Assembling the Test Engine-Installations 7.9
responsibility of the user of this standard to establish appro-
Engine Installation on the Test Stand 7.10
priate safety and health practices and determine the applica-
Engine Fluids (Supply/Discharge Systems) 8
bility of regulatory limitations prior to use. Specific hazard Intake Air 8.1
Fuel and Fuel System 8.2
statements are given in 7.7, 7.10.2.2, 8.3.4.2, 8.4.4.3, 9.2.6,
Engine Oil and Engine Oil System 8.3
9.3.4.5, 12.1.1.7, 12.2.1.4, and Annex A1.
Coolants 8.4
1.4 A Table of Contents follows: Measurement Instrumentation 9
Temperatures 9.1
Pressures 9.2
Flow Rates 9.3
1
This test method is under the jurisdiction of ASTM Committee D02 on
Fuel Consumption 9.4
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
Speed and Load 9.5
D02.B0.01 on Passenger Car Engine Oils.
Exhaust Gas 9.6
Current edition approved Nov. 1, 2007. Published December 2007. Originally
Humidity 9.7
approved in 2000. Last previous edition approved in 2007 as D 6593–07. Miscellaneous Laboratory Equipment 10
2
Until the next revision of this test method, the ASTM Test Monitoring Center Test Stand Calibration 11
Test Procedure 12
will update changes in the test method by means of information letters. Information
Pre-Test Procedure 12.1
letters may be obtained from the ASTM Test Monitoring Center, 6555 Penn Ave.,
Engine Operating Procedure 12.2
Pittsburgh, PA 15206-4489. Attention: Administrator. This edition incorporates
Periodic Measurements and Functions 12.3
revisions in all information Letters through No. 06–2.
3
Special Maintenance Procedures 12.4
Supporting data have been filed at ASTM International Headquarters and may
Diagnostic Data Review 12.5
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
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D 6593 – 07a
D 2622 Test Method for Sulfur in Petroleum Products by
End of Test Procedure 12.6
Interpretation of Test Results 13
Wavelength Dispersive X-ray Fluorescence Spectrometry
Parts Rating Area-Environment 13.1
D 2789 Test Method for Hydrocarbon Types in Low Ole-
Sludge Ratings 13.2
finic Gasoline by Mass Spectrometry
Varnish Ratings 13.3
Clogging 13.4
D 3237 Test Method for Lead in Gasoline by Atomic
Sticking 13.5
Absorption Spectroscopy
Used Oil Analyses 13.6
D 3525 Test Method for Gasoline Diluent in Used Gasoline
Assessment of Test Validity 14
General 14.1
Engine Oils by Gas Chromatography
Used Oil Analyses-Interpretation 14.2
D 4057 Practice for Manual Sampling of Petroleum and
Blowby Flow Rate 14.3
Manifold Absolute Pressure 14.4 Petroleum Products
Fuel Consumption Rate 14.5
D 4175 Terminology Relating to Petroleum, Petroleum
Oil Consumption 14.6
Products, and Lubricants
Engine Parts Replacement 14.7
Quality Index and Deviation Percentage 14.8 D 4294 Test Method for Sulfur in Petroleum and Petroleum
Final Test Report 15
Products by Energy-Dispersive X-ray Fluorescence Spec-
Report Forms 15.1
trometry
Precision and Bias 16
D 4485 Specification for
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
An American National Standard
Designation:D6593–07 Designation: D 6593 – 07a
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
2
1.1 ThistestmethodcoversandiscommonlyreferredtoastheSequenceVGtest, andithasbeencorrelatedwithvehiclesused
3
instop-and-goservicepriorto1996,particularlywithregardtosludgeandvarnishformation. Itisoneofthetestmethodsrequired
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. The values given in parentheses are for information only.
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
1
This test method is under the jurisdiction ofASTM Committee D02 on Petroleum Products and Lubricants and is the direct responsibility of Subcommittee D02.B0.01
on Passenger Car Engine Oils.
Current edition approved MayNov. 1, 2007. Published MayDecember 2007. Originally approved in 2000. Last previous edition approved in 20062007 as
D6593–06a.D 6593–07.
2
Until the next revision of this test method, theASTM Test Monitoring Center will update changes in the test method by means of information letters. Information letters
may be obtained from the ASTM Test Monitoring Center, 6555 Penn Ave., Pittsburgh, PA 15206-4489. Attention: Administrator. This edition incorporates revisions in all
information Letters through No. 06–1. 06–2.
3
Supporting data have been filed at ASTM International Headquarters and may 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 – 07a
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
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 Calibratio
...
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