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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 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
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 17
Keywords 18
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 Calibration Annex A8
Critical Part Supplier List Annex A9
Operational Data Log-Engine Oil Annex A10
Rating Worksheets Annex A11
Fuel   Injector Flow Measurements Annex A12
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

Product Details

Published:
10/15/2008
Number of Pages:
72
File Size:
1 file , 1.2 MB
Redline File Size:
2 files , 2.3 MB