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
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.
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, 18.104.22.168, 22.214.171.124, 126.96.36.199, 9.2.6, 188.8.131.52, 184.108.40.206, 220.127.116.11, and Annex A5.
1.4 A Table of Contents follows:
Summary of Test Method
Significance and Use
Apparatus (General Description)
Apparatus (The Test Engine)
Sequence VG Test Engine
Required New Engine Parts
Reusable Engine Parts
Specially Fabricated Engine Parts
Special Engine Measurement and Assembly Equipment
Miscellaneous Engine Components-Preparation
Solvents and Cleaners Required
Assembling the Test Engine-Preparations
Assembling the Test Engine-Installations
Engine Installation on the Test Stand
Engine Fluids (Supply/Discharge Systems)
Fuel and Fuel System
Engine Oil and Engine Oil System
Speed and Load
Miscellaneous Laboratory Equipment
Test Stand Calibration
Engine Operating Procedure
Periodic Measurements and Functions
Special Maintenance Procedures
Diagnostic Data Review
End of Test Procedure
Interpretation of Test Results
Parts Rating Area-Environment
Used Oil Analyses
Assessment of Test Validity
Used Oil Analyses-Interpretation
Blowby Flow Rate
Manifold Absolute Pressure
Fuel Consumption Rate
Engine Parts Replacement
Quality Index and Deviation Percentage
Final Test Report
Precision and Bias
ASTM Test Monitoring Center Organization
ASTM Test Monitoring Center: Calibration Procedures
ASTM Test Monitoring Center: Maintenance Activities
ASTM Test Monitoring Center: Related Information
Control and Data Acquisition Requirements
Detailed Specifications and Photographs of Apparatus
Special Service Tools for the Test Engine
Test Engine Part Number Listing
External Oil Heat Exchanger Cleaning Technique
Sequence VG Report Forms and Data Dictionary
Critical Part Supplier List
Operational Data Log-Engine Oil
Fuel Injector Flow Measurements
Piston and Ring Measurements Record Forms
Sources of Materials and Information
Description of Scott Quarterly Gas Audit Service
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.
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