Standard Historical Last Updated: Dec 31, 2010 Track Document
ASTM D6750-08

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 Engine1K Procedure (0.4 % Fuel Sulfur) and 1N Procedure (0.04 % Fuel Sulfur) D6750-08 ASTM|D6750-08|en-US Standard Test Methods for Evaluation of Engine Oils in a High-Speed, Single-Cylinder Diesel Engine1K Procedure (0.4 % Fuel Sulfur) and 1N Procedure (0.04 % Fuel Sulfur) Standard new BOS Vol. 05.03 Committee D02
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Significance and Use

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.

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.

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.

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 % 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 The values stated in SI units are to be regarded as standard. The values given in parentheses are provided for information only.

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 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 Annex A16 on Safety Precautions).

1.5 The following is the Table of Contents:

Section
Introduction
Scope1
Referenced documents2
Terminology3
Summary of Test Methods4
Significance and Use5
Apparatus6
General Laboratory Requirements6.1
Test Engine6.2
Test Engine Accessories and Parts6.3
Reagents and Materials7
Test Oil Sample Requirements8
Preparation of Apparatus 9
Engine Inspection9.1
Engine Pre-Test Lubrication System Flush9.2
Engine Pre-Test Measurements and Inspections9.3
Engine Assembly9.4
Pressure Testing of Fuel System Assembly9.5
Calibration of Engine Test Stand10
General Requirements and Frequency of Calibration10.1
Runs10.2
Specified Test Parameters10.3
Calibration Test Acceptance Criteria10.4
Action on Rejection of Calibration Test10.5
Test Numbering10.6
Reference Oils10.7
Severity Adjustments10.8
Engine Operating Procedure11
Engine Run-In11.1
Cool-Down Procedure11.2
Warm-Up Procedure11.3
Operating Conditions and Oil Additions11.4
Measurement of Oil Consumption11.5
Sampling Used Oil11.6
Shutdowns, Lost Time and Off Tolerance Conditions11.7
Recording of Exhaust Temperature11.8
Air-Fuel Ratio Measurement11.9
Recording of Engine Conditions11.10
Humidity Requirements/Calibration/Measurement11.11
Inspections, Photographs and Measurements12
Reference to Reporting Form12.1
Pre-Test Measurements of Engine Parts12.2
Post-Test Information12.3
Oil Inspections12.4
Report14
General Directions14.1
Electronic Transmission of Test Results (Optional)14.2
Reporting Calibration Test Results14.3
Precision and Bias15
Keywords16
ANNEXES
Specifications for Test Engine and Engine BuildAnnex A1
Intake Air System DetailsAnnex A2
Exhaust System DetailsAnnex A3
Cooling System DetailsAnnex A4
Oil System Modifications and Instrument LocationsAnnex A5
Other Pressure and Temperature Measurement LocationsAnnex A6
Oil Consumption Linear Regression MethodAnnex A7
Test Fuel SpecificationsAnnex A8
Lubrication System, Flush Apparatus and ProcedureAnnex A9
Engine Operating ConditionsAnnex A10
Procedure for Rating Piston and LinerAnnex A11
Calculation of Percent Offset and Percent DeviationAnnex A12
1K/1N Test ReportingAnnex A13
Parts List by Part Number (P/N) and WarrantyAnnex A14
Role of Test Monitoring CenterAnnex A15
Safety PrecautionsAnnex A16
APPENDIXES
Humidity DataAppendix X1
Statistical Equations for Mean and Standard DeviationAppendix X2
Examples of Forms for ReportingAppendix X3
Optional Recording of Oil Pass LimitsAppendix X4

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Details
Book of Standards Volume: 05.03
Developed by Subcommittee: D02.B0.02
Pages: 68
DOI: 10.1520/D6750-08
ICS Code: 75.100