Область применения

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:

SubjectSectionIntroductionScope1Referenced Documents2Terminology3Summary of Test Method4Before Test Starts4.1Power Section Installation4.2Engine Operation (Break-in)4.3Engine Operation (Test/Samples)4.4Stripped Viscosity4.5Test Completion (BWL)4.6Significance and Use5Evaluation of Automotive oils5.1Stay in Grade Capabilities5.2Correlation of Results5.3Use5.4Apparatus6Test Engineering, Inc.6.1Fabricated or Specially Prepared Items6.2Instruments and Controls6.3Procurement of Parts6.4Reagents and Materials7Reagents7.1Cleaning Materials7.2Expendable Power Section-Related Items7.3Power Section Coolant7.4Reference Oils7.5Test Fuel7.6Test Oil Sample Requirements8Selection8.1Inspection8.2Quantity8.3Preparation of Apparatus9Test Stand Preparation9.1Conditioning Test Run on Power Section9.2General Power Section Rebuild Instructions9.3Reconditioning of Power Section After Each Test9.4Calibration10Power Section and Test Stand Calibration10.1Instrumentation Calibration10.2Calibration of AFR Measurement Equipment10.3Calibration of Torque Wrenches10.4Engine Operating Procedure11Run-In and Flush11.1Test Operating Conditions11.2Air-Fuel Ratio and Spark Advance11.3Air, Off-Gas and Blowby Measurement11.4Unscheduled Shutdowns11.5Oil Sampling and Oil Addition11.6Periodic Measurements11.7Final Oil Drain and Oil Consumption Computation11.8Operational Validity Criteria11.9Test Completion11.10Determination of Test Results12Oil Analysis12.1Test Bearing Weight Loss Determination12.2Report13Precision and Bias14Precision14.1Bias14.2Use of ASTM Rounding15Keywords16ANNEXESMeasurement of Connecting Rod BearingAnnex A1Clearance and Journal TaperMeasurement of Main Bearing ClearanceAnnex A2The ASTM Test Monitoring CenterAnnex A3Calibration ProgramMeasurement of Piston-to-Sleeve ClearanceAnnex A4Control Chart Technique for a Laboratory'sSeverity Adjustment (SA)Annex A5Recommended New Liner Honing ProcedureAnnex A6Sequence VIII Oil Priming ProcedureAnnex A7Alternative Crankcase Breather ConfigurationAnnex A8Connecting Rod Bearing Cleaning ProcedureAnnex A9Electronic Ignition ConversionAnnex A10System Response ProcedureAnnex A11Air-Fuel Ratio MeasurementAnnex A12Lead Decontamination ProcedureAnnex A13Stay-in-Grade Oil Analysis ProcedureAnnex A14Crankshaft Rear Seal ConditioningAnnex A15Report FormsAnnex A16Data DictionaryAnnex A17APPENDIXESRole of the ASTM Test Monitoring Center and the Calibration ProgramAppendix X1Suggested Method for SalvagingCamshaft Bearing JournalsAppendix X2Data Log SheetsAppendix X3