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ASTM D7528-22

(Test Method)

Standard Test Method for Bench Oxidation of Engine Oils by ROBO Apparatus

Standard Test Method for Bench Oxidation of Engine Oils by ROBO Apparatus

SIGNIFICANCE AND USE
5.1 This bench test method is intended to produce comparable oil aging characteristics to those obtained with ASTM TMC Sequence IIIGA matrix reference oils 434, 435, and 438 after aging in the Sequence IIIG engine test.  
5.2 To the extent that the method generates aged oils comparable to those from the Sequence IIIG engine test, the measured increases in kinematic and MRV viscosity indicate the tendency of an oil to thicken because of volatilization and oxidation, as in the Sequence IIIG and IIIGA (see Appendix X1 in Test Method D7320) engine tests, respectively.  
5.3 This bench test procedure has potential use in specifications and classifications of engine lubricating oils, such as Specification D4485.  
5.4 The results of this test method are valid when seeking qualification of oils against published specifications only when run on a test stand that has successfully met the calibration requirements specified under the TMC’s ROBO test monitoring program.
SCOPE
1.1 This test method describes a bench procedure to simulate the oil aging encountered in Test Method D7320, the Sequence IIIG engine test method. These aged oils are then tested for kinematic viscosity and for low-temperature pumpability properties as described in the Sequence IIIGA engine test, Appendix X1 of Test Method D7320.  
1.2 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.2.1 Exceptions—There are no SI equivalents for some apparatus in Section 6, and there are some figures where inch units are to be regarded as standard.  
1.3 This test method is arranged as follows:    
Section  
Scope  
1  
Reference Documents  
2  
Terminology  
3  
Summary of Test Method  
4  
Significance and Use  
5  
Apparatus  
6  
Reagents and Materials  
7  
Hazards  
8  
New and Existing Test Stand Calibration  
9  
Procedure  
10  
Cleaning  
11  
Calculations and Determination of Test Results  
12  
Report  
13  
Precision and Bias  
14  
Keywords  
15  
Annexes  
ASTM Test Monitoring Center: Organization  
Annex A1  
ASTM Test Monitoring Center: Calibration Procedures  
Annex A2  
ASTM Test Monitoring Center: Maintenance Activities  
Annex A3  
ASTM Test Monitoring Center: Related Information  
Annex A4  
Reaction Vessel  
Annex A5  
Reaction Vessel Head  
Annex A6  
Reaction Vessel-to-Head Seal  
Annex A7  
Agitator Turbine Blade  
Annex A8  
Agitator Packing Gland  
Annex A9  
Nitrogen Dioxide Graduated Tube  
Annex A10  
Vacuum System Plumbing  
Annex A11  
Vacuum Trap Condensers  
Annex A12  
Setting the Vacuum Control Valve  
Annex A13  
Appendixes  
Sample Preparation and Addition  
Appendix X1  
Charging the Liquid Nitrogen Dioxide  
Appendix X2  
Nitrogen Dioxide Precision Needle Valve  
Appendix X3  
Example of an Assembled ROBO Apparatus  
Appendix X4  
Information Package to Aid Setting Up a New Robo Apparatus  
Appendix X5  
Dilute Nitrogen Dioxide in Air Option Information  
Appendix X6  
Time-Averaged Subsurface Air Flow Rate  
Appendix X7  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific warning statements are given in Sections 7 and 8.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Published
Publication Date
31-Mar-2022
ICS
75.100 - Lubricants, industrial oils and related products
Technical Committee
D02 - Petroleum Products, Liquid Fuels, and Lubricants
Drafting Committee
D02.B0.07 - Development and Surveillance of Bench Tests Methods
Current Stage
Ref Project

Relations

Refers
ASTM D5293-20 - Standard Test Method for Apparent Viscosity of Engine Oils and Base Stocks Between –10 °C and –35 °C Using Cold-Cranking Simulator
Effective Date
01-Jun-2020

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Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D7528 − 22
Standard Test Method for
1
Bench Oxidation of Engine Oils by ROBO Apparatus
This standard is issued under the fixed designation D7528; 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
This test method is written for use by laboratories that make use ofASTM Test Monitoring Center
2
(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.
1. Scope* 1.3 This test method is arranged as follows:
Section
1.1 This test method describes a bench procedure to simu-
Scope 1
late the oil aging encountered in Test Method D7320, the
Reference Documents 2
Sequence IIIG engine test method. These aged oils are then Terminology 3
Summary of Test Method 4
tested for kinematic viscosity and for low-temperature pump-
Significance and Use 5
ability properties as described in the Sequence IIIGA engine
Apparatus 6
test, Appendix X1 of Test Method D7320.
Reagents and Materials 7
Hazards 8
1.2 Units—The values stated in SI units are to be regarded
New and Existing Test Stand Calibration 9
Procedure 10
asstandard.Nootherunitsofmeasurementareincludedinthis
Cleaning 11
standard.
Calculations and Determination of Test Results 12
1.2.1 Exceptions—There are no SI equivalents for some
Report 13
Precision and Bias 14
apparatus in Section 6, and there are some figures where inch
Keywords 15
units are to be regarded as standard.
Annexes
ASTM Test Monitoring Center: Organization Annex A1
ASTM Test Monitoring Center: Calibration Procedures Annex A2
1
This test method is under the jurisdiction of ASTM Committee D02 on
ASTM Test Monitoring Center: Maintenance Activities Annex A3
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of
ASTM Test Monitoring Center: Related Information Annex A4
Subcommittee D02.B0.07 on Development and Surveillance of Bench Tests
Reaction Vessel Annex A5
Methods. Reaction Vessel Head Annex A6
Current edition approved April 1, 2022. Published April 2022. Originally Reaction Vessel-to-Head Seal Annex A7
Agitator Turbine Blade Annex A8
approved in 2009. Last previous edition approved in 2021 as D7528–21. DOI:
Agitator Packing Gland Annex A9
10.1520/D7528-22.
2
Nitrogen Dioxide Graduated Tube Annex A10
Until the next revision of this test method, the ASTM Test Monitoring Center
Vacuum System Plumbing Annex A11
will update changes in the test method by means of information letters. Information
Vacuum Trap Condensers Annex A12
letters may be obtained from the ASTM Test Monitoring Center, 203 Armstrong
Setting the Vacuum Control Valve Annex A13
Drive, Freeport, PA 16229, www.astmtmc.org. Attention: Director. This edition
Appendixes
incorporates revisions in all information letters through No. 21-1.
*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

---------------------- Page: 1 ----------------------
D7528 − 22
to evaluate other materials (such as seals) that interact with
Section
Sample Preparation and Addition Appendix X1
oils. D4175
Charging the Liquid Nitrogen Dioxide Appendix X2
Nitrogen Dioxide Precision Needle Valve Appendix X3
3.1.4 test oil, n—any oil subjected to evaluation in an
Example of an Assembled ROBO Apparatus Appendix X4
established procedure. D4175
Information Package to Aid Setting Up a New Robo Apparatus Appe
...

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: D7528 − 21 D7528 − 22
Standard Test Method for
1
Bench Oxidation of Engine Oils by ROBO Apparatus
This standard is issued under the fixed designation D7528; 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
This test method is written for use by laboratories that make use of ASTM Test Monitoring Center
2
(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.
1. Scope*
1.1 This test method describes a bench procedure to simulate the oil aging encountered in Test Method D7320, the Sequence IIIG
engine test method. These aged oils are then tested for kinematic viscosity and for low-temperature pumpability properties as
described in the Sequence IIIGA engine test, Appendix X1 of Test Method D7320.
1.2 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this
standard.
1.2.1 Exceptions—There are no SI equivalents for some apparatus in Section 6, and there are some figures where inch units are
to be regarded as standard.
1.3 This test method is arranged as follows:
1
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.B0.07 on Development and Surveillance of Bench Tests Methods.
Current edition approved Jan. 1, 2021April 1, 2022. Published January 2021April 2022. Originally approved in 2009. Last previous edition approved in 20172021 as
D7528 – 17a.D7528 – 21. DOI: 10.1520/D7528-21.10.1520/D7528-22.
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.203 Armstrong Drive, Freeport, PA 16229,
www.astmtmc.org. Attention: Director. This edition incorporates revisions in all information letters through No. 20-1.21-1.
*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

---------------------- Page: 1 ----------------------
D7528 − 22
Section
Scope 1
Reference Documents 2
Terminology 3
Summary of Test Method 4
Significance and Use 5
Apparatus 6
Reagents and Materials 7
Hazards 8
New and Existing Test Stand Calibration 9
Procedure 10
Cleaning 11
Calculations and Determination of Test Results 12
Report 13
Precision and Bias 14
Keywords 15
Annexes
ASTM Test Monitoring Center: Organization Annex A1
ASTM Test Monitoring Center: Calibration Procedures Annex A2
ASTM Test Monitoring Center: Maintenance Activities Annex A3
ASTM Test Monitoring Center: Related Information Annex A4
Reaction Vessel Annex A5
Reaction Vessel Head Annex A6
Reaction Vessel-to-Head Seal Annex A7
Agitator Turbine Blade Annex A8
Agitator Packing Gland Annex A9
Nitrogen Dioxide Graduated Tube Annex A10
Vacuum System Plumbing Annex A11
Vacuum Trap Condensers Annex A12
Setting the Vacuum Control Valve Annex A13
Appendixes
Sample Preparation and Addition Appendix X1
Charging the Liquid Nitrogen Dioxide Appendix X2
Nitrogen Dioxide Precision Ne
...

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Scope  
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Referenced documents  
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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  
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Reagents and Materials  
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Test Oil Sample Requirements  
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Preparation of Apparatus  
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1.4 The following is the Table of Contents:    
Section  
Scope  
1  
Referenced Documents  
2  
Terminology  
3  
Summary of Test Method  
4  
Significance and Use  
5  
Apparatus and Installation  
6  
Intake Air System  
6.2.1  
Exhaust System  
6.2.2  
Fuel System  
6.2.3  
Oil Consumption System  
6.2.4  
Engine Oil System  
6.2.5  
Oil Heating System  
6.2.5.1  
Oil Sample Valve  
6.2.5.2  
Engine Coolant System  
6.2.6  
Engine Instrumentation  
6.2.7  
Reagents and Materials  
7  
Oil Samples  
8  
Preparation of Apparatus  
9  
General Engine Assembly Practices  
9.1  
Complete Engine Inspection  
9.2  
Copper Components  
9.3  
Engine Lubricant System Flush  
9.4  
Engine Piston Cooling Jets  
9.5  
Engine Measurements and Inspections  
9.6  
Cylinder Head  
9.7  
Valve Guide Bushings  
9.8  
Fuel Injector  
9.9  
Piston and Rings  
9.10  
Cylinder Liner  
9.11  
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9.12  
Engine Timing  
9.13  
Engine Coolant System Cleaning Procedure  
9.14  
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10  
Test Cell Instrumentation  
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Instrumentation Standards  
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Re-calibration Requirements  
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Calibration of Test Stands  
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Extending Test Stand Calibration Period  
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10.13  
Humidity Calibration Requirements  
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Procedure  
11  
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Post-Test Procedures  
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Piston Ring Side Clearances  
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Piston Ratings  
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Referee Ratings  
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Standard Test Method for Measurement of Effects of Automotive Engine Oils on Fuel Economy of Passenger Cars and Light-Duty Trucks in Sequence VIE Spark Ignition

SIGNIFICANCE AND USE
5.1 Test Method—The data obtained from the use of this test method provide a comparative index of the fuel-saving capabilities of automotive engine oils under repeatable laboratory conditions. A BL has been established for this test to provide a standard against which all other oils can be compared. The BL oil is an SAE 20W-30 grade fully formulated lubricant. The test procedure was not designed to give a precise estimate of the difference between two test oils without adequate replication. The test method was developed to compare the test oil to the BL oil. Companion test methods used to evaluate engine oil performance for specification requirements are discussed in the latest revision of Specification D4485.  
5.2 Use—The Sequence VIE test method is useful for engine oil fuel economy specification acceptance. It is used in specifications and classifications of engine lubricating oils, such as the following:  
5.2.1 Specification D4485.  
5.2.2 API 1509.  
5.2.3 SAE Classification J304.  
5.2.4 SAE Classification J1423.
SCOPE
1.1 This test method covers an engine test procedure for the measurement of the effects of automotive engine oils on the fuel economy of passenger cars and light-duty trucks with gross vehicle weight 3856 kg or less. The tests are conducted using a specified spark-ignition engine with a displacement of 3.6 L (General Motors)4 on a dynamometer test stand. It applies to multi-viscosity oils used in these applications.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.2.1 Exceptions—Where there is no direct equivalent such as the units for screw threads, National Pipe threads/diameters, tubing size, and single source supply equipment specifications. Additionally, Brake Specific Fuel Consumption (BSFC) is measured in kilogram per kilowatt hour.  
1.3 This test method is arranged as follows:    
Subject  
Section  
Introduction  
Scope  
1  
Referenced Documents  
2  
Terminology  
3  
Summary of Test Method  
4  
Significance and Use  
5  
Apparatus  
6  
General  
6.1  
Test Engine Configuration  
6.2  
Laboratory Ambient Conditions  
6.3  
Engine Speed and Torque Control  
6.4  
Dynamometer  
6.4.1  
Dynamometer Torque  
6.4.2  
Engine Cooling System  
6.5  
External Oil System  
6.6  
Fuel System  
6.7  
Fuel Flow Measurement  
6.7.2  
Fuel Temperature and Pressure Control to the Fuel Flow Meter  
6.7.3  
Fuel Temperature and Pressure Control to Engine Fuel Rail  
6.7.4  
Fuel Supply Pumps  
6.7.5  
Fuel Filtering  
6.7.6  
Engine Intake Air Supply  
6.8  
Intake Air Humidity  
6.8.1  
Intake Air Filtration  
6.8.2  
Intake Air Pressure Relief  
6.8.3  
Temperature Measurement  
6.9  
Thermocouple Location  
6.9.5  
AFR Determination  
6.10  
Exhaust and Exhaust Back Pressure Systems  
6.11  
Exhaust Manifolds  
6.11.1  
Laboratory Exhaust System  
6.11.2  
Exhaust Back Pressure  
6.11.3  
Pressure Measurement and Pressure Sensor Locations  
6.12  
Engine Oil  
6.12.2  
Fuel to Fuel Flow Meter  
6.12.3  
Fuel to Engine Fuel Rail  
6.12.4  
Exhaust Back Pressure  
6.12.5  
Intake Air  
6.12.6  
Intake Manifold Vacuum/Absolute Pressure  
6.12.7  
Coolant Flow Differential Pressure  
6.12.8  
Crankcase Pressure  
6.12.9  
Engine Hardware and Related Apparatus  
6.13  
Test Engine Configuration  
6.13.1  
ECU (Power Control Module)  
6.13.2  
Thermostat Block-Off Adapter Plate  
6.13.3  
Wiring Harness  
6.13.4  
Thermostat Block-Off Plate  
6.13.5  
Oil Filter Adapter Plate  
6.13.6  
Modified Throttle Body Assembly  
6.13.7  
Fuel Rail  
6.13.8  
Miscellaneous Apparatus Related to Engine Operation  
6.14  
Reagents and Materials  
7  
Engine Oil  
7.1  
Test Fuel  
7.2  
Engine Coolant  
7.3  
Cleaning Materials...

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ASTM
ASTM D5770-23(Test Method)
Standard Test Method for Semiquantitative Micro Determination of Acid Number of Lubricating Oils During Oxidation Testing

SIGNIFICANCE AND USE
5.1 This test method provides a semiquantitative estimate of the acid number of lubricating oils obtained from laboratory oxidation tests using smaller amounts of sample than Test Methods D974, D664, or D3339. It has specific application in Test Method D943 and in Test Method D4871. This test method, therefore, provides a means of monitoring the relative oxidation of lubricating oils by measuring changes in acid number, at different time intervals and under various oxidizing test conditions.  
5.2 Since this test method is semiquantitative, each laboratory shall develop its own criteria for each oxidation test method for determining when to switch from this semiquantitative test method to a more precise test method for acid number.
SCOPE
1.1 This test method is a semiquantitative micro method intended for monitoring the changes in acidic constituents occurring in lubricating oils during oxidation testing, when the acid number of such oils falls within the range from 0.02 mg to 1.0 mg of potassium hydroxide per gram of sample. It is applicable to such oils as turbine oils, hydraulic oils, and other circulating oils.  
Note 1: This test method is a micro version of Test Method D974 and it produces results similar to that method.  
1.2 This test method is designed for use where sample size is limited. It shall not be used as a replacement for higher precision methods such as Test Methods D974 or D664. It shall not be used to monitor oils in-service.  
1.3 The values stated in SI units are to be regarded as the standard.  
1.3.1 Exception—The values given in parentheses are 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ASTM
ASTM D4175-23(Terminology)
Standard Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants

SCOPE
1.1 This terminology standard covers the compilation of terminology developed by Committee D02 on Petroleum Products, Liquid Fuels, and Lubricants, except that it does not include terms/definitions specific only to the standards in which they appear.  
1.1.1 The terminology, mostly definitions, is unique to petroleum, petroleum products, lubricants, and certain products from biomass and chemical synthesis. Meanings of the same terms outside of applications to petroleum, petroleum products, and lubricants can be found in other compilations and in dictionaries of general usage.  
1.1.2 The terms/definitions exist in two places:  (1) in the standards in which they appear and (2) in this compilation.  
1.2 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ASTM
ASTM D7549-23(Test Method)
Standard Test Method for Evaluation of Heavy-Duty Engine Oils under High Output Conditions—Caterpillar C13 Test Procedure

SIGNIFICANCE AND USE
5.1 This test method assesses the performance of an engine oil with respect to control of piston deposits and maintenance of oil consumption under heavy-duty operating conditions selected to accelerate deposit formation in a turbocharged, intercooled four-stroke-cycle diesel engine equipped with a combustion system that minimizes federally controlled exhaust gas emissions.  
5.2 The results from this test method may be compared against specification requirements to ascertain acceptance.  
5.3 The design of the test engine used in this test method is representative of many, but not all, diesel engines. This factor, along with the accelerated operating conditions, needs to be considered when comparing test results against specification requirements.
SCOPE
1.1 The test method covers a heavy-duty engine test procedure under high output conditions to evaluate engine oil performance with regard to piston deposit formation, piston ring sticking and oil consumption control in a combustion environment designed to minimize exhaust emissions. This test method is commonly referred to as the Caterpillar C13 Heavy-Duty Engine Oil Test.3  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.2.1 Exceptions—Where there are no SI equivalent such as screw threads, National Pipe Treads (NPT), and tubing sizes.  
1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. See Annex A1 for general safety precautions.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ASTM
ASTM D8111-23a(Test Method)
Standard Test Method for Evaluation of Automotive Engine Oils in the Sequence IIIH, Spark-Ignition Engine

SIGNIFICANCE AND USE
5.1 This test method was developed to evaluate automotive engine oils for protection against oil thickening and piston deposits during moderately high-speed, hightemperature service.  
5.1.1 The increase in kinematic viscosity of the oil indicates the tendency of an oil to thicken because of oxidation. In automotive service, such thickening can cause oil pump starvation and resultant catastrophic engine failures.  
5.1.2 The deposit ratings for an oil indicate the tendency for the formation of deposits throughout the engine, including those that can cause sticking of the piston rings in their grooves. In automotive service, such ring sticking can cause a loss of compression pressures in the engine.  
5.2 The test method was developed to correlate with oils of known good and poor protection against oil thickening and piston deposits. Specially formulated oils that produce less than desirable results with unleaded fuels were also used during the development of this test.  
5.3 The Sequence IIIH engine oil test has been recommended as a replacement for the Sequence IIIG test and is expected to be used in specifications and classifications of engine lubricating oils, such as the following:  
5.3.1 Specification D4485.  
5.3.2 Military Specification MIL-PRF-2104.  
5.3.3 SAE Classification J183.
SCOPE
1.1 This test method covers an engine test procedure for evaluating automotive engine oils for certain high-temperature performance characteristics, including oil thickening (as measured by kinematic viscosity increase), piston deposits, ring sticking, oil consumption, and phosphorus retention. Such oils include both single-viscosity and multiviscosity grade oils that are used in both spark-ignition, gasoline-fueled engines, as well as in diesel engines.  
1.1.1 Additionally, with nonmandatory supplemental requirements, a Sequence IIIHA Test (Mini Rotary Viscometer and Cold Cranking Simulator measurements), or a Sequence IIIHB Test (phosphorus retention measurement) can be conducted. These supplemental test procedures are contained in Appendix X1 and Appendix X2, respectively.
Note 1: Companion test methods used to evaluate engine oil performance for specification requirements are discussed in SAE J304.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.2.1 Exceptions:  
1.2.1.1 Where there is no direct SI equivalent such as screw threads, national pipe threads/diameters, tubing sizes, and valve sizes and springs.
1.2.1.2 The ring end gaps in Table A8.7, the dimensions for the blowby ventilation support bracket in Fig. A3.2, and the torque wrenches in Table A8.1 are in inch-pound units.  
1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Specific warning statements are provided in 6.11.6, 7.1, 7.2.1, and 7.3.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ASTM
ASTM D8256-23(Test Method)
Standard Test Method for Evaluation of Automotive Engine Oils for Inhibition of Deposit Formation in the Sequence VH Spark-Ignition Engine Fueled with Gasoline and Operated Under Low-Temperature, Light-Duty Conditions

SIGNIFICANCE AND USE
5.1 This test method is used to evaluate an automotive engine oil's control of engine deposits under operating conditions deliberately selected to accelerate deposit formation. This VH test method was correlated with the previous VG test method, which was correlated with field service data, determined from side-by-side comparisons of two or more oils in police, taxi fleets, and delivery van services.  
5.2 This test method, along with other test methods are used to define an engine oils minimum performance level necessary to meet certification requirements for API Category Specifications as outlined in Specification D4485. This test method may also be incorporated in automobile manufacturers’ factory–fill specifications.  
5.3 The basic engine used in this test method is representative of many that are in modern automobiles. This factor, along with the accelerated operating conditions, should be considered when interpreting test results.
SCOPE
1.1 This test method is commonly referred to as the Sequence VH test, and it has been correlated with the Sequence VG test. The Sequence VG test was previously correlated with vehicles used in stop-and-go service prior to 1996, particularly with regard to sludge and varnish formation.3 It is one of the test methods required to evaluate oils intended to satisfy the API SN, SN Plus performance category.  
1.2 The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard.  
1.2.1 Exception—Where there is no direct SI equivalent such as screw threads, national pipe threads/diameters, tubing size, or specified single source equipment.  
1.3 A table of contents follows:    
Section  
Scope  
1  
Referenced Documents  
2  
Terminology  
3  
Summary of Test Method  
4  
Significance and Use  
5  
Apparatus (General Description)  
6  
Apparatus (The Test Engine)  
7  
Sequence VH Test Engine  
7.1  
Required New Engine Parts  
7.2  
Reusable Engine Parts  
7.3  
Specially Fabricated Engine Parts  
7.4  
Special Engine Measurement and Assembly Equipment  
7.5  
Miscellaneous Engine Components—Preparation  
7.6  
Solvents and Cleaners Required  
7.7  
Assembling the Test Engine—Preparations  
7.8  
Assembling the Test Engine—Installations  
7.9  
Engine Installation on the Test Stand  
7.10  
Engine Fluids (Supply/Discharge Systems)  
8  
Intake Air  
8.1  
Fuel and Fuel System  
8.2  
Engine Oil and Engine Oil System  
8.3  
Coolants  
8.4  
Measurement Instrumentation  
9  
Temperatures  
9.1  
Pressures  
9.2  
Flow Rates  
9.3  
Fuel Consumption  
9.4  
Speed and Torque  
9.5  
Exhaust Gas  
9.6  
Humidity  
9.7  
Miscellaneous Laboratory Equipment  
10  
Test Stand Calibration  
11  
Test Procedure  
12  
Pre-Test Procedure  
12.1  
Engine Operating Procedure  
12.2  
Periodic Measurements and Functions  
12.3  
Special Maintenance Procedures  
12.4  
Diagnostic Data Review  
12.5  
End of Test Procedure  
12.6  
Interpretation of Test Results  
13  
Parts Rating Area—Environment  
13.1  
Sludge Ratings  
13.2  
Varnish Ratings  
13.3  
Clogging  
13.4  
Sticking  
13.5  
Used Oil Analyses  
13.6  
Assessment of Test Validity  
14  
General  
14.1  
Used Oil Analyses—Interpretation  
14.2  
Blowby Flow Rate  
14.3  
Manifold Absolute Pressure (MAP)  
14.4  
Fuel Consumption Rate  
14.5  
Oil Consumption  
14.6  
Engine Parts Replacement  
14.7  
Quality Index  
14.8  
Final Test Report  
15  
Report Forms  
15.1  
Precision and Bias  
16  
Keywords  
17  
ANNEXES  
ASTM TMC: Organization  
Annex A1  
ASTM TMC: Calibration Procedures  
Annex A2  
ASTM TMC: Maintenance Activities  
Annex A3  
ASTM TMC: Related Information  
Annex A4  
Safety Precautions  
Annex A5  
Control and Data Acquis...

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