5.1 This test method is used to evaluate automotive engine oils for protection of engines against bearing weight loss.
5.2 This test method is also used to evaluate the SIG capabilities of multiviscosity-graded oils.
5.3 Correlation of test results with those obtained in automotive service has not been established.
5.4 Use—The Sequence VIII test method is useful for engine oil specification acceptance. It is used in specifications and classifications of engine lubricating oils, such as the following:
5.4.1 Specification D4485.
5.4.2 API Publication 1509 Engine Oil Licensing and Certification System.6
5.4.3 SAE Classification J304.
Область применения1.1 This test method covers the evaluation of automotive engine oils (SAE grades 0W, 5W, 10W, 20, 30, 40, and 50, and multi-viscosity grades) intended for use in spark-ignition gasoline engines. The test procedure is conducted using a carbureted, spark-ignition Cooperative Lubrication Research (CLR) Oil Test Engine (also referred to as the Sequence VIII test engine in this test method) run on unleaded fuel. An oil is evaluated for its ability to protect the engine and the oil from deterioration under high-temperature and severe service conditions. The test method can also be used to evaluate the viscosity stability of multi-viscosity-graded oils. Companion test methods used to evaluate engine oil performance for specification requirements are discussed in the latest revision of Specification D4485.
1.2 Correlation of test results with those obtained in automotive service has not been established. Furthermore, the results obtained in this test are not necessarily indicative of results that will be obtained in a full-scale automotive spark-ignition or compression-ignition engine, or in an engine operated under conditions different from those of the test. The test can be used to compare one oil with another.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3.1 Exceptions—The values stated in inch-pounds for certain tube measurements, screw thread specifications, and sole source supply equipment are to be regarded as standard.
1.4 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 precautionary statements are provided throughout this test method.
1.5 This test method is arranged as follows:
Subject
Section
Introduction
Scope
Referenced Documents
Terminology
Summary of Test Method
Before Test Starts
Power Section Installation
Engine Operation (Break-in)
Engine Operation (Test/Samples)
Stripped Viscosity
Test Completion (BWL)
Significance and Use
Evaluation of Automotive oils
Stay in Grade Capabilities
Correlation of Results
Use
Apparatus
Test Engineering, Inc.
Fabricated or Specially Prepared Items
Instruments and Controls
Procurement of Parts
Reagents and Materials
Reagents
Cleaning Materials
Expendable Power Section-Related Items
Power Section Coolant
Reference Oils
Test Fuel
Test Oil Sample Requirements
Selection
Inspection
Quantity
Preparation of Apparatus
Test Stand Preparation
Conditioning Test Run on Power Section
General Power Section Rebuild Instructions
Reconditioning of Power Section After Each Test
Calibration
Power Section and Test Stand Calibration
Instrumentation Calibration
Calibration of AFR Measurement Equipment
Calibration of Torque Wrenches
Engine Operating Procedure
Run-In and Flush
Test Operating Conditions
Air-Fuel Ratio and Spark Advance
Air, Off-Gas and Blowby Measurement
Unscheduled Shutdowns
Oil Sampling and Oil Addition
Periodic Measurements
Final Oil Drain and Oil Consumption Computation
Operational Validity Criteria
Test Completion
Determination of Test Results
Oil Analysis
Test Bearing Weight Loss Determination
Report
Precision and Bias
Precision
Bias
Use of ASTM Rounding
Keywords
ANNEXES
Measurement of Connecting Rod Bearing Clearance and
Journal Taper
Measurement of Main Bearing Clearance
The ASTM Test Monitoring Center Calibration Program
Measurement of Piston-to-Sleeve Clearance
Control Chart Technique for a Laboratory's Severity
Adjustment (SA)
Recommended New Liner Honing Procedure
Sequence VIII Oil Priming Procedure
Alternative Crankcase Breather Configuration
Connecting Rod Bearing Cleaning Procedure
Electronic Ignition Conversion
System Response Procedure
Air-Fuel Ratio Measurement
Lead Decontamination Procedure
Stay-in-Grade Oil Analysis Procedure
Crankshaft Rear Seal Conditioning
Report Forms and Data Dictionary
Test Fuel Specification
APPENDIXES
Role of the ASTM Test Monitoring Center and the Calibration Program
Suggested Method for Salvaging Camshaft Bearing Journals
Data Log Sheets