Significance and Use
5.1 This test method is used to evaluate automotive engine oils for protection of engines against bearing weight loss.
Scope
1.1 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.
| Subject | Section | ||
| Introduction |
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| Scope | |||
| Referenced Documents | |||
| Terminology | |||
| Summary of Test Method | |||
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| Before Test Starts | ||
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| Power Section Installation | ||
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| Engine Operation (Break-in) | ||
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| Engine Operation (Test/Samples) | ||
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| Stripped Viscosity | ||
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| Test Completion (BWL) | ||
| Significance and Use | |||
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| Evaluation of Automotive oils | ||
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| Stay in Grade Capabilities | ||
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| Correlation of Results | ||
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| Use | ||
| Apparatus | |||
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| Test Engineering, Inc. | ||
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| Fabricated or Specially Prepared Items | ||
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| Instruments and Controls | ||
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| Procurement of Parts | ||
| Reagents and Materials | |||
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| Reagents | ||
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| Cleaning Materials | ||
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| Expendable Power Section-Related Items | ||
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| Power Section Coolant | ||
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| Reference Oils | ||
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| Test Fuel | ||
| Test Oil Sample Requirements | |||
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| Selection | ||
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| Inspection | ||
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| Quantity | ||
| Preparation of Apparatus | |||
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| Test Stand Preparation | ||
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| Conditioning Test Run on Power Section | ||
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| General Power Section Rebuild Instructions | ||
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| Reconditioning of Power Section After Each Test | ||
| Calibration | |||
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| Power Section and Test Stand Calibration | ||
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| Instrumentation Calibration | ||
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| Calibration of AFR Measurement Equipment | ||
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| Calibration of Torque Wrenches | ||
| Engine Operating Procedure | |||
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| Run-In and Flush | ||
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| Test Operating Conditions | ||
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| Air-Fuel Ratio and Spark Advance | ||
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| Air, Off-Gas and Blowby Measurement | ||
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| Unscheduled Shutdowns | ||
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| Oil Sampling and Oil Addition | ||
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| Periodic Measurements | ||
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| Final Oil Drain and Oil Consumption Computation | ||
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| Operational Validity Criteria | ||
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| Test Completion | ||
| Determination of Test Results | |||
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| Oil Analysis | ||
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| Test Bearing Weight Loss Determination | ||
| Report | |||
| Precision and Bias | |||
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| Precision | ||
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| Bias | ||
| Use of ASTM Rounding | |||
| Keywords | |||
| ANNEXES | |||
| Measurement of Connecting Rod Bearing Clearance and | |||
| 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 | |||
| 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 | |||
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| APPENDIXES | |||
| Role of the ASTM Test Monitoring Center and the Calibration Program | |||
| Suggested Method for Salvaging Camshaft Bearing Journals | |||
| Data Log Sheets | |||
