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1.1 This test method covers a four-stroke cycle diesel engine test procedure for evaluating engine oils for certain high-temperature performance characteristics, particularly ring sticking, ring and cylinder wear, and accumulation of piston deposits. Such oils include both single viscosity SAE grade and multiviscosity SAE grade oils used in diesel engines. It is commonly known as the 1M-PC test (PC for Pre-Chamber) and is used in several API oil categories, notably the CF and CF-2 and the military category described in MIL-PRF-2104 (see Note 1).

Note 1—Companion test methods used to evaluate other engine oil performance characteristics for API oil categories CF and CF-2 are discussed in SAE J304. The companion tests used by the military can be found in MIL-PRF-2104.

1.2 The values stated in either SI units or other units are to be regarded separately as the standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other, without combining values in any way.

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.

1.4 This test method is arranged as follows:

TABLE OF CONTENTSScope1Reference Documents2Terminology3Summary of Test Method4Significance and Use5Apparatus6Test Engine6.1Engine Accessories6.2-6.14Engine Oil System6.15Cooling System6.16Fuel System6.17Intake Air System6.18Exhaust System6.19Blowby Meter6.20Thermocouples6.21Parts6.22Instrumentation6.23Crankcase Paint6.24Reagents and Materials7Fuel7.1Test Oil7.2Engine Coolant7.3Cleaning Materials7.4Safety8Preparation of Apparatus9Supplementary Service Information9.1General Engine Inspection9.2Intake Air System9.3Cooling System9.4Engine Cooling System Cleaning9.5Instrumentation Calibration Requirements9.6Engine Crankcase Cleaning9.7Additional Oil Filter9.8Flushing Procedure Components9.9Flushing Procedures9.10Piston Cleaning Preparation9.11Cylinder Head9.12Fuel Nozzle9.13Measurement9.14Procedure10Engine Break-in10.1Pre-Test Preparations10.2Warm-up Procedure10.3Operating Conditions10.4Periodic Measurements10.5Engine Oil Level10.6Oil Addition Procedure10.7Cool-Down Procedure10.8Shutdowns10.9Fuel System10.10Brake Specific Oil Consumption (BSOC) Calculation10.11Inspection11Preparation11.1Inspection11.2Rater Training11.3Referee Ratings11.4Calibration of Test Method12Requirements12.1Reference Oils12.2Test Numbering12.3Definition of a Test12.4New Laboratories and New Test Stands12.5Frequency of Calibration Tests12.6Specified Test Parameters12.7Acceptance of Calibration Tests12.8Failing Reference Oil Calibration Tests12.9Non-Standard Tests12.10Severity Adjustments and Control Charting12.11Test Reporting12.12Reporting Reference Results12.13Analysis of Reference Oils12.14Precision and Bias13Precision13.1Bias13.2Keywords14ANNEXESFigures and SchematicsAnnex A1Report FormsAnnex A2Data DictionaryAnnex A3Test Fuel InformationAnnex A4APPENDIXESHumidity Correction FactorsAppendex X1Report Form ExamplesAppendix X21M-PC Multiple TestingAppendix X3