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1.1 This test method is used to evaluate automotive engine oils (SAE grades 5W, 10W, 20, 30, 40, and 50, and multiviscosity 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 multiviscosity-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, except for (1) volume which is given in the metric, but non-SI, litre, (2) certain tube measurements which are given in the inch-pound unit, (3) cylinder bore and stroke in both SI and inch-pound units (the inch-pound being the standard) and (4) piston displacement given in metric (non-SI) and inch-pound unit (the inch-pound being the standard). In respect to (3) and (4) the inch-pound units are shown first and the SI units in parenthesis.

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:

SubjectSection
Introduction
Scope1
Referenced Documents2
Terminology3
Summary of Test Method4
Before Test Starts4.1
Power Section Installation4.2
Engine Operation (Break-in)4.3
Engine Operation (Test/Samples)4.4
Stripped Viscosity4.5
Test Completion (BWL)4.6
Significance and Use5
Evaluation of Automotive oils5.1
Stay in Grade Capabilities5.2
Correlation of Results5.3
Use5.4
Apparatus6
Test Engineering, Inc.6.1
Fabricated or Specially Prepared Items6.2
Instruments and Controls6.3
Procurement of Parts6.4
Reagents and Materials7
Reagents7.1
Cleaning Materials7.2
Expendable Power Section-Related Items7.3
Power Section Coolant7.4
Reference Oils7.5
Test Fuel7.6
Test Oil Sample Requirements8
Selection8.1
Inspection8.2
Quantity8.3
Preparation of Apparatus9
Test Stand Preparation9.1
Conditioning Test Run on Power Section9.2
General Power Section Rebuild Instructions9.3
Reconditioning of Power Section After Each Test9.4
Calibration10
Power Section and Test Stand Calibration10.1
Instrumentation Calibration10.2
Calibration of AFR Measurement Equipment10.3
Calibration of Torque Wrenches10.4
Engine Operating Procedure11
Run-In and Flush11.1
Test Operating Conditions11.2
Air-Fuel Ratio and Spark Advance11.3
Air, Off-Gas and Blowby Measurement11.4
Unscheduled Shutdowns11.5
Oil Sampling and Oil Addition11.6
Periodic Measurements11.7
Final Oil Drain and Oil Consumption Computation11.8
Operational Validity Criteria11.9
Test Completion11.10
Determination of Test Results12
Oil Analysis12.1
Test Bearing Weight Loss Determination12.2
Report13
Precision and Bias14
Precision14.1
Bias14.2
Use of ASTM Rounding15
Keywords16
ANNEXES
Measurement of Connecting Rod BearingAnnex A1
Clearance and Journal Taper
Measurement of Main Bearing ClearanceAnnex A2
The ASTM Test Monitoring CenterAnnex A3
Calibration Program
Measurement of Piston-to-Sleeve ClearanceAnnex A4
Control Chart Technique for a Laboratory’sSeverity Adjustment (SA)Annex A5
Recommended New Liner Honing ProcedureAnnex A6
Sequence VIII Oil Priming ProcedureAnnex A7
Alternative Crankcase Breather ConfigurationAnnex A8
Connecting Rod Bearing Cleaning ProcedureAnnex A9
Electronic Ignition ConversionAnnex A10
System Response ProcedureAnnex A11
Air-Fuel Ratio MeasurementAnnex A12
Lead Decontamination ProcedureAnnex A13
Stay-in-Grade Oil Analysis ProcedureAnnex A14
Crankshaft Rear Seal ConditioningAnnex A15
Report FormsAnnex A16
Data DictionaryAnnex A17
APPENDIXES
Role of the ASTM Test Monitoring Center and the Calibration ProgramAppendix X1
Suggested Method for SalvagingCamshaft Bearing JournalsAppendix X2
Data Log SheetsAppendix X3

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Published:
08/10/2001
Number of Pages:
53
File Size:
1 file , 2.9 MB