ASTM D6750-05

ASTM D6750-05 - 1.5.2005

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 % 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 either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therfore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

1.4This 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).

2. Referenced Documents

D445-26	Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)
D1298-24	Standard Test Method for Density, Relative Density, or API Gravity of Crude Petroleum and Liquid Petroleum Products by Hydrometer Method
D1319-25	Standard Test Method for Hydrocarbon Types in Liquid Petroleum Products by Fluorescent Indicator Adsorption
D2425-23	Standard Test Method for Hydrocarbon Types in Middle Distillates by Mass Spectrometry
D2500-23	Standard Test Method for Cloud Point of Petroleum Products and Liquid Fuels
D2622-26	Standard Test Method for Sulfur in Petroleum Products by Wavelength Dispersive X-ray Fluorescence Spectrometry
D2709-22	Standard Test Method for Water and Sediment in Middle Distillate Fuels by Centrifuge
SAE J183	Engine Oil Performance and Engine Service Classification Available from the Society of Automotive Engineers Inc., 400 Commonwealth Dr., Warrendale, PA 15096. Order SAE Handbook, Vol 3; the standard is not available separately.
API 1509	Engine Service Classification and Guide to Crankcase Oil Selection Available from the American Petroleum Institute, 1220 L St., NW, Washington, DC 20005.
ASTM Deposit Rating Manual 20	(Formerly CRC Manual 20) For Stock #TMCMNL20, visit the ASTM website, www.astm.org, or contact ASTM International Customer Service at service@astm.org.
D130-26	Standard Test Method for Corrosiveness to Copper from Petroleum Products by Copper Strip Test
D287-22	Standard Test Method for API Gravity of Crude Petroleum and Petroleum Products (Hydrometer/Method)
D482-25	Standard Test Method for Ash from Petroleum Products
D524-15(2025)e1	Standard Test Method for Ramsbottom Carbon Residue of Petroleum Products (Includes all amendments and changes 8/11/2025).
D613-26	Standard Test Method for Cetane Number of Diesel Fuel Oil
D664-24	Standard Test Method for Acid Number of Petroleum Products by Potentiometric Titration
D1796-22	Standard Test Method for Water and Sediment in Fuel Oils by the Centrifuge Method (Laboratory Procedure)
D3117-03	Standard Test Method for Wax Appearance Point of Distillate Fuels (Withdrawn 2010)
D4485-24	Standard Specification for Performance of Active API Service Category Engine Oils
D4737-21	Standard Test Method for Calculated Cetane Index by Four Variable Equation
D3524-14(2020)	Standard Test Method for Diesel Fuel Diluent in Used Diesel Engine Oils by Gas Chromatography
D4739-26	Standard Test Method for Base Number Determination by Potentiometric Hydrochloric Acid Titration
D5185-26	Standard Test Method for Multielement Determination of Used and Unused Lubricating Oils and Base Oils by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES)
D5862-09	Standard Test Method for Evaluation of Engine Oils in Two-Stroke Cycle Turbo-Supercharged 6V92TA Diesel Engine (Withdrawn 2009)
D6202-02	Standard Test Method for Automotive Engine Oils on the Fuel Economy of Passenger Cars and Light-Duty Trucks in the Sequence VIA Spark Ignition Engine (Withdrawn 2009)
D6594-26	Standard Test Method for Evaluation of Corrosiveness of Diesel Engine Oil at 135 °C
D7422-25	Standard Test Method for Evaluation of Diesel Engine Oils in T-12 Exhaust Gas Recirculation Diesel Engine
E29-22	Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
IEEE/ASTM SI 10	Standard for Use of the International System of Units (SI): The Modern Metric System
D5186-24	Standard Test Method for Determination of the Aromatic Content and Polynuclear Aromatic Content of Diesel Fuels By Supercritical Fluid Chromatography
D5844-98	Standard Test Method for Evaluation of Automotive Engine Oils for Inhibition of Rusting (Sequence IID) (Withdrawn 2003)
D86-23ae2	Standard Test Method for Distillation of Petroleum Products and Liquid Fuels at Atmospheric Pressure (Includes all amendments and changes 11/4/2024).
D93-26	Standard Test Methods for Flash Point by Pensky-Martens Closed Cup Tester
D97-17b(2022)	Standard Test Method for Pour Point of Petroleum Products (Includes all amendments and changes 11/29/2022).
D235-22	Standard Specification for Mineral Spirits (Petroleum Spirits) (Hydrocarbon Dry Cleaning Solvent)