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ASTM D6750-06

Historical Revision

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)

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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 % fuel sulfur) or 1N (0.04 % fuel sulfur) 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 D 4485.

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 A15).

1.3 &combined-units;

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 appear throughout the text. Being engine tests, these test methods do have definite hazards that shall be met by safe practices (see on Safety Precautions).

1.4 The following is the Table of Contents:


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 0.4 % sulfur fuel (1K test) or 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.

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 0.4 % by mass. These data are given in Research Report RR:D02-1273.8

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 0.05 % mass sulfur. See Research Report RR:D02-1321.8

These test methods are used in the establishment of diesel engine oil specification requirements as cited in Specification D 4485 for appropriate API Performance Category oils (API 1509).

These test methods are also used in diesel engine oil development.

SDO ASTM: ASTM International
Document Number D6750
Publication Date Nov. 1, 2006
Language en - English
Page Count 69
Revision Level 06
Supercedes
Committee D02.B0.02
Publish Date Document Id Type View
July 1, 2023 D6750-23 Revision
May 1, 2019 D6750-19E01 Revision
May 1, 2019 D6750-19 Revision
April 1, 2018 D6750-18 Revision
May 1, 2017 D6750-17 Revision
Oct. 1, 2016 D6750-16 Revision
Oct. 1, 2015 D6750-15A Revision
April 1, 2015 D6750-15 Revision
May 1, 2014 D6750-14 Revision
May 1, 2013 D6750-13 Revision
Oct. 1, 2010 D6750-10B Revision
July 1, 2010 D6750-10A Revision
May 1, 2010 D6750-10 Revision
April 15, 2009 D6750-09 Revision
Oct. 15, 2008 D6750-08 Revision
Nov. 1, 2006 D6750-06 Revision
Nov. 1, 2005 D6750-05A Revision
May 1, 2005 D6750-05 Revision
Nov. 1, 2004 D6750-04 Revision
Jan. 10, 2002 D6750-02 Revision