ASTM D8047 : 23

Standard Test Method for Evaluation of Engine Oil Aeration Resistance in a Caterpillar C13 Direct-Injected Turbocharged Automotive Diesel Engine

Standard Details

1.1 This test method evaluates an engine oil's resistance to aeration in automotive diesel engine service. It is commonly referred to as the Caterpillar-C13 Engine-Oil Aeration Test (COAT). The test is conducted under high-engine-speed (1800 r/min), zero-load conditions using a specified Caterpillar 320 kW, direct-injection, turbocharged, after-cooled, six-cylinder diesel engine designed for heavy-duty, on-highway truck use. This test method was developed as a replacement for Test Method D6894.

Note 1: Companion test methods used to evaluate engine oil performance for specification requirements are discussed in the latest revision of Specification D4485.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.2.1 Exception—Where there is no direct SI equivalent, for example, screw threads, national pipe threads/diameters, and tubing size.

1.3 This test method is arranged as follows:

	Section
Scope	1
Referenced Documents	2
Terminology	3
Summary of Test Method	4
Significance and Use	5
Apparatus	6
Engine Liquids and Cleaning Solvent	7
Preparation of Apparatus	8
Engine Stand Calibration and Non-Reference Oil Tests	9
Procedure	10
Calculation, Test Validity and Test Results	11
Report	12
Precision and Bias	13
Keywords	14
ASTM Test Monitoring Center Organization	Annex A1
Safety Precautions	Annex A2
Engine and Engine Build Parts Kit	Annex A3
Oil Temperature Control System	Annex A4
Engine Modifications and Instrumentation	Annex A5
Flow Density Meter Calibration or Verification Procedure	Annex A6
Aeration Measurement System	Annex A7
Specified Units and Formats	Annex A8
ASTM TMC: Calibration Procedures	Annex A9
ASTM TMC: Maintenance Activities	Annex A10
ASTM TMC: Related Information	Annex A11
Engine Break-in and Silicon Passivation Procedure	Annex A12
Schedule for Taking Oil Samples and Carrying out Analyses	Annex A13
Determination of Operational Validity	Annex A14
Typical System Configuration	Appendix X1

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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. See Annex A2 for general safety precautions.

1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International StandardDetails, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.