ASTM D8047-18

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Designation: D8047 − 17a D8047 − 18
Standard Test Method for
Evaluation of Engine Oil Aeration Resistance in a Caterpillar
C13 Direct-Injected Turbocharged Automotive Diesel
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Engine
This standard is issued under the fixed designation D8047; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
Portions of this test method are written for use by laboratories that make use of ASTM Test
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Monitoring Center (TMC) services (see Annex A1).
The TMC provides reference oils, and engineering and statistical services to laboratories that desire
to produce test results that are statistically similar to those produced by laboratories previously
calibrated by the TMC.
In general, the Test Purchaser decides if a calibrated test stand is to be used. Organizations such as
the American Chemistry Council require that a laboratory utilize the TMC services as part of their test
registration process. In addition, the American Petroleum Institute and the Gear Lubricant Review
Committee of the Lubricant Review Institute (SAE International) require that a laboratory use the
TMC services in seeking qualification of oils against their specifications.
The advantage of using the TMC services to calibrate test stands is that the test laboratory (and
hence the Test Purchaser) has an assurance that the test stand was operating at the proper level of test
severity. It should also be borne in mind that results obtained in a non-calibrated test stand may not
be the same as those obtained in a test stand participating in the ASTM TMC services process.
ASTM International policy is to encourage the development of test procedures based on generic
equipment. It is recognized that there are occasions where critical/sole-source equipment has been
approved by the technical committee (surveillance panel/task force) and is required by the test
procedure. The technical committee that oversees the test procedure is encouraged to clearly identify
if the part is considered critical in the test procedure. If a part is deemed to be critical, ASTM
encourages alternative suppliers to be given the opportunity for consideration of supplying the critical
part/component providing they meet the approval process set forth by the technical committee.
An alternative supplier can start the process by initiating contact with the technical committee
(current chairs shown on ASTM TMC website). The supplier should advise on the details of the part
that is intended to be supplied. The technical committee will review the request and determine
feasibility of an alternative supplier for the requested replacement critical part. In the event that a
replacement critical part has been identified and proven equivalent the sole-source supplier footnote
shall be removed from the test procedure.
1. Scope*
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.
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This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Subcommittee
D02.B0 on Automotive Lubricants.
Current edition approved Oct. 1, 2017Oct. 1, 2018. Published October 2017November 2018. Originally approved in 2016. Last previous edition approved in 2017 as
D8047 – 17.D8047 – 17a. DOI: 10.1520/D8047-17A.10.1520/D8047-18.
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Until the next revision of this test method, the ASTM Test Monitoring Center will update changes in the test method by means of information letters. Information letters
may be obtained from the ASTM Test Monitoring Center, 6555 Penn Avenue, Pittsburgh, PA 15206-4489, Attention Administrator. This edition incorporates revisions in all
information letters through No. 17-1.17-2. http://www.astmtmc.cmu.edu.
*A Summary of Changes section appears at the end of this standard
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