ASTM D6750-18
(Test Method)Standard Test Methods for Evaluation of Engine Oils in a High-Speed, Single-Cylinder Diesel Engine—1K Procedure (0.4 % Fuel Sulfur) and 1N Procedure (0.04 % Fuel Sulfur)
Standard Test Methods for Evaluation of Engine Oils in a High-Speed, Single-Cylinder Diesel Engine—1K Procedure (0.4 % Fuel Sulfur) and 1N Procedure (0.04 % Fuel Sulfur)
SIGNIFICANCE AND USE
5.1 These are accelerated engine oil tests (known as the 1K and 1N test procedures), performed in a standardized, calibrated, stationary single-cylinder diesel engine using either mass fraction 0.4 % sulfur fuel (1K test) or mass fraction 0.04 % sulfur fuel (1N test), that give a measure of (1) piston and ring groove deposit forming tendency, (2) piston, ring and liner scuffing and (3) oil consumption.
5.2 The 1K test was correlated with vehicles equipped with certain multi-cylinder direct injection engines used in heavy duty and high speed service prior to 1989, particularly with respect to aluminum piston deposits, and oil consumption, when fuel sulfur was nominally mass fraction 0.4 %. These data are given in Research Report RR:D02-1273.9
5.3 The 1N test has been used to predict piston deposit formation in four-stroke cycle, direct injection, diesel engines that have been calibrated to meet 1994 U.S. federal exhaust emission requirements for heavy-duty engines operated on fuel containing less than mass fraction 0.05 % sulfur. See Research Report RR:D02-1321.9
5.4 These test methods are used in the establishment of diesel engine oil specification requirements as cited in Specification D4485 for appropriate API Performance Category oils (API 1509).
5.5 These test methods are also used in diesel engine oil development.
SCOPE
1.1 These test methods cover the performance of engine oils intended for use in certain diesel engines. They are performed in a standardized high-speed, single-cylinder diesel engine by either the 1K (0.4 % mass fuel sulfur) or 1N (0.04 % mass fuel sulfur) procedure.3 The only difference in the two test methods is the fuel used. Piston and ring groove deposit-forming tendency and oil consumption are measured. Also, the piston, the rings, and the liner are examined for distress and the rings for mobility. These test methods are required to evaluate oils intended to satisfy API service categories CF-4 and CH-4 for 1K, and CG-4 for 1N of Specification D4485.
1.2 These test methods, although based on the original Caterpillar 1K/1N procedures,3 also embody TMC information letters issued before these test methods were first published. These test methods are subject to frequent change. Until the next revision of these test methods, TMC will update changes in these test methods by the issuance of information letters which shall be obtained from TMC (see Annex A1 – Annex A4).
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3.1 Exception—Where there is no direct SI equivalent such as screw threads, national pipe threads/diameters, tubing size, or single source equipment specified. Also Brake Specific Fuel Consumption is measured in kilograms per kilowatthour.
1.4 The following is the Table of Contents:
Section
Introduction
Scope
1
Referenced documents
2
Terminology
3
Summary of Test Methods
4
Significance and Use
5
Apparatus
6
General Laboratory Requirements
6.1
Test Engine
6.2
Test Engine Accessories and Parts
6.3
Reagents and Materials
7
Test Oil Sample Requirements
8
Preparation of Apparatus
9
Engine Inspection
9.1
Engine Pre-Test Lubrication System Flush
9.2
Engine Pre-Test Measurements and Inspections
9.3
Engine Assembly
9.4
Pressure Testing of Fuel System Assembly
9.5
Calibration of Engine Test Stand
10
General Requirements and Frequency of Calibration
10.1
Runs
10.2
Specified Test Parameters
10.3
Calibration Test Acceptance Criteria
10.4
Action on Rejection of Calibration Test
10.5
Test Numbering
10.6
Reference Oils
10.7
Severity Adjustments
10.8
Engine Operating Procedure
11
...
General Information
Relations
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Designation: D6750 − 18
Standard Test Methods for
Evaluation of Engine Oils in a High-Speed, Single-Cylinder
Diesel Engine—1K Procedure (0.4 % Fuel Sulfur) and 1N
1
Procedure (0.04 % Fuel Sulfur)
This standard is issued under the fixed designation D6750; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber 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
2
Monitoring Center (TMC) services (see Annex A1 – Annex A4).
TheTMCprovidesreferenceoils,andengineeringandstatisticalservicestolaboratoriesthatdesire
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
theAmericanChemistryCouncilrequirethatalaboratoryutilizetheTMCservicesaspartoftheirtest
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 theTest 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.
Laboratories that choose not to use the TMC services may simply disregard these portions.
1. Scope* intended to satisfy API service categories CF-4 and CH-4 for
1K, and CG-4 for 1N of Specification D4485.
1.1 Thesetestmethodscovertheperformanceofengineoils
1.2 These test methods, although based on the original
intended for use in certain diesel engines. They are performed
3
Caterpillar1K/1Nprocedures, alsoembodyTMCinformation
in a standardized high-speed, single-cylinder diesel engine by
letters issued before these test methods were first published.
eitherthe1K(0.4%massfuelsulfur)or1N(0.04%massfuel
3
These test methods are subject to frequent change. Until the
sulfur) procedure. The only difference in the two test methods
next revision of these test methods, TMC will update changes
is the fuel used. Piston and ring groove deposit-forming
in these test methods by the issuance of information letters
tendency and oil consumption are measured. Also, the piston,
which shall be obtained from TMC (see Annex A1 – Annex
the rings, and the liner are examined for distress and the rings
A4).
for mobility. These test methods are required to evaluate oils
1.3 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
standard.
1
These test methods are under the jurisdiction of ASTM Committee D02 on
1.3.1 Exception—Where there is no direct SI equivalent
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
Subcommittee D02.B0.02 on Heavy Duty Engine Oils.
such as screw threads, national pipe threads/diameters, tubing
Current edition approved April 1, 2018. Published April 2018. Originally
size, or single source equipment specified.Also Brake Specific
approved in 2002. Last previous edition approved in 2017 as D6750–17. DOI:
Fuel Consumption is measured in kilograms per kilowatthour.
10.1520/D6750-18.
2
Until the next revision of this test method, the ASTM Test Monitoring Center
1.4 The following is the Table of Contents:
will update changes in the test method by means of information letters. Information
Section
letters may be obtained from the ASTM Test Monitoring Center, 6555 Penn Ave.,
Introduction
Pittsburgh, PA 15206-4489. Attention: Administrator. This edition incorporates
Scope 1
revisions in all information Letters through No. 17-1.
3
Referenced documents 2
These1K/1NtestproceduresweredevelopedbyCaterpillarInc.,P.O.Box610,
Terminology 3
Mossville, IL 61552-0610.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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D6750 − 18
Specific precautionary statements appear throughout the text.
Summary of Test Methods 4
Significance and Use 5
Being engine tests, these test methods do have definite hazards
Apparatus 6
that shall be met by safe practices (see Annex A19 on Safety
General Laboratory Requirements 6.1
Precautions).
Test Engine 6.2
Te
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D6750 − 17 D6750 − 18
Standard Test Methods for
Evaluation of Engine Oils in a High-Speed, Single-Cylinder
Diesel Engine—1K Procedure (0.4 % Fuel Sulfur) and 1N
1
Procedure (0.04 % Fuel Sulfur)
This standard is issued under the fixed designation D6750; 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
2
Monitoring Center (TMC) services (see Annex A1 – Annex A4).
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.
Laboratories that choose not to use the TMC services may simply disregard these portions.
1. Scope*
1.1 These test methods cover the performance of engine oils intended for use in certain diesel engines. They are performed in
a standardized high-speed, single-cylinder diesel engine by either the 1K (0.4 % mass fuel sulfur) or 1N (0.04 % mass fuel sulfur)
3
procedure. The only difference in the two test methods is the fuel used. Piston and ring groove deposit-forming tendency and oil
consumption are measured. Also, the piston, the rings, and the liner are examined for distress and the rings for mobility. These test
methods are required to evaluate oils intended to satisfy API service categories CF-4 and CH-4 for 1K, and CG-4 for 1N of
Specification D4485.
3
1.2 These test methods, although based on the original Caterpillar 1K/1N procedures, also embody TMC information letters
issued before these test methods were first published. These test methods are subject to frequent change. Until the next revision
of these test methods, TMC will update changes in these test methods by the issuance of information letters which shall be obtained
from TMC (see Annex A1 – Annex A4).
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3.1 Exception—Where there is no direct SI equivalent such as screw threads, national pipe threads/diameters, tubing size, or
single source equipment specified. Also Brake Specific Fuel Consumption is measured in kilograms per kilowatthour.
1.4 The following is the Table of Contents:
1
These test methods are under the jurisdiction of ASTM Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
Subcommittee D02.B0.02 on Heavy Duty Engine Oils.
Current edition approved May 1, 2017April 1, 2018. Published May 2017April 2018. Originally approved in 2002. Last previous edition approved in 20162017 as
D6750 – 16.D6750 – 17. DOI: 10.1520/D6750-17.10.1520/D6750-18.
2
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 Ave., Pittsburgh, PA 15206-4489. Attention: Administrator. This edition incorporates revisions in all
information Letters through No. 16-2.17-1.
3
These 1K/1N test procedures were developed by Caterpillar Inc., P.O. Box 610, Mossville, IL 61552-0610.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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