ASTM D5966-22

Standard Test Method for Evaluation of Engine Oils for Roller Follower Wear in Light-Duty Diesel Engine

SIGNIFICANCE AND USE
5.1 This test method is used to determine the ability of an engine crankcase oil to control wear that can develop in the field under low to moderate engine speeds and heavy engine torques. Side-by-side comparisons of two or more oils in delivery van fleets were used to demonstrate the field performance of various oils. The specific operating conditions of this test method were developed to provide correlation with the field performance of these oils.  
5.2 This test method, along with other test methods, defines the minimum performance level of the Category API CG-4 for heavy duty diesel engine lubricants. Passing limits for this category are included in Specification D4485.  
5.3 The design of the engine used in this test method is not representative of all modern diesel engines. Consider this factor, along with the specific operating conditions used to accelerate wear, when extrapolating test results.
SCOPE
1.1 This engine lubricant test method is commonly referred to as the Roller Follower Wear Test. Its primary result, roller follower shaft wear in the hydraulic valve lifter assembly, has been correlated with vehicles used in stop-and-go delivery service prior to 1993. It is one of the test methods required to evaluate lubricants intended to satisfy the API CG-4 performance category. This test has also been referred to as the 6.2 L Test.  
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 SI equivalent, such as pipe fittings, thermocouple diameters, and NPT screw threads. Also, roller follower wear is measured in mils.  
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.  
1.4 Table of Contents:    
Section  
Scope  
1  
Referenced Documents  
2  
Terminology  
3  
Summary of Test Method  
4  
Significance and Use  
5  
Reagents  
7  
Guidelines on Substitution  
7.1  
Apparatus  
6  
Preparation of Apparatus  
8  
New Engine Preparation  
8.1  
Installation of Auxiliary Systems and
Miscellaneous Components  
8.2  
Test Procedure  
9  
Description of Test Segments and Organization
of Test Procedure Sections  
9.1  
Engine Parts Replacement  
9.2  
Engine Starting Procedure  
9.3  
Normal Engine Shutdown Procedure  
9.4  
Emergency Shutdown Procedure  
9.5  
Unscheduled Shutdown and Downtime  
9.6  
New Engine Break-In  
9.7  
Pretest Procedure  
9.8  
Fifty-Hour Steady State Test  
9.9  
Periodic Measurements  
9.10  
Oil Sampling and Oil Addition Procedures  
9.11  
End of Test (EOT) Procedure  
9.12  
Calculation and Interpretation of Test Results  
10  
Environment of Parts Measurement Area  
10.1  
Roller Follower Shaft Wear Measurements  
10.2  
Oil Analysis  
10.3  
Assessment of Test Validity  
10.4  
Final Test Report  
11  
Reporting Calibration Test Results  
11.1  
Report Forms  
11.2  
Interim Non-Valid Calibration Test Summary  
11.3  
Severity Adjustments  
11.4  
Precision and Bias  
12  
Precision  
12.1  
Precision Estimate  
12.2  
Bias  
12.3  
Keywords  
13  
ANNEXES    
Guidelines for Test Part Substitution or Modification  
Annex A1  
Guidelines for Units and Specification Formats  
Annex A2  
Detailed Specifications of Apparatus  
Annex A3  
Calibration  
Annex A4  
Final Report Forms  
Annex A5  
Illustrations  
Annex A6  
Kinematic Viscosity at 100°C Procedure for the
Roller Follower Wear Test  
Annex A7  
Enhanced Thermal Gravimetric Analysis (TGA)
Procedure for Soot Measurement  
Annex A8  
Sources of Mat...

General Information

• Status: Published
• Publication Date: 31-Mar-2022
• ICS: 19.020 - Test conditions and procedures in general
• ICS: 75.100 - Lubricants, industrial oils and related products
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.B0.02 - Heavy Duty Engine Oils

Relations

• Refers: ASTM D93-20 - Standard Test Methods for Flash Point by Pensky-Martens Closed Cup Tester
• Effective Date: 01-Aug-2020

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: D5966 − 22
Standard Test Method for
Evaluation of Engine Oils for Roller Follower Wear in Light-
1
Duty Diesel Engine
This standard is issued under the fixed designation D5966; 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 continually undergoing changes to reflect refinements in procedure, obsoles-
cenceofpartsorreagents.Thesechangesorupdates,aswellasgeneralinformationregardingthetest
method, are issued as information letters by the ASTM Test Monitoring Center (TMC). Copies of
information letters pertaining to the test method may be obtained by contacting the ASTM Test
2
Monitoring Center.
Thetestmethodcanbeusedbyanyproperlyequippedlaboratory,withoutassistanceofanyonenot
associated with that laboratory. However, TMC provides reference oils and an assessment of the test
resultsobtainedonthoseoilsbythelaboratory.Bythismeans,thelaboratorywillknowwhethertheir
use of the test method gives results statistically similar to those obtained by other laboratories.
Furthermore, various agencies require that a laboratory utilize the TMC services in seeking
qualification of oils against specifications. For example, the U.S.Army imposes such a requirement,
in connection with several military lubricant specifications.
Accordingly, this test method is written for use by laboratories which utilize the TMC services.
Laboratories that choose not to use these services may simply ignore those portions of the test
procedure which refer to the TMC.
1. Scope 1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
1.1 This engine lubricant test method is commonly referred
responsibility of the user of this standard to establish appro-
to as the Roller Follower Wear Test. Its primary result, roller
priate safety, health, and environmental practices and deter-
follower shaft wear in the hydraulic valve lifter assembly, has
mine the applicability of regulatory limitations prior to use.
been correlated with vehicles used in stop-and-go delivery
service prior to 1993. It is one of the test methods required to
1.4 Table of Contents:
evaluate lubricants intended to satisfy the API CG-4 perfor-
Section
mance category.This test has also been referred to as the 6.2 L Scope 1
Referenced Documents 2
Test.
Terminology 3
Summary of Test Method 4
1.2 The values stated in SI units are to be regarded as
Significance and Use 5
standard. No other units of measurement are included in this
Reagents 7
standard.
Guidelines on Substitution 7.1
Apparatus 6
1.2.1 Exceptions—Where there is no direct SI equivalent,
Preparation of Apparatus 8
such as pipe fittings, thermocouple diameters, and NPT screw
New Engine Preparation 8.1
threads. Also, roller follower wear is measured in mils.
Installation of Auxiliary Systems and 8.2
Miscellaneous Components
Test Procedure 9
Description of Test Segments and Organization 9.1
1
This test method is under the jurisdiction of ASTM Committee D02 on
of Test Procedure Sections
Petroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility of Engine Parts Replacement 9.2
Subcommittee D02.B0.02 on Heavy Duty Engine Oils. Engine Starting Procedure 9.3
Normal Engine Shutdown Procedure 9.4
Current edition approved April 1, 2022. Published April 2022. Originally
Emergency Shutdown Procedure 9.5
approved in 1996. Last previous edition approved in 2013 as D5966–13, which
Unscheduled Shutdown and Downtime 9.6
waswithdrawnJanuary2022andreinstatedinApril2022.DOI:10.1520/D5966-22.
2
New Engine Break-In 9.7
ASTM Test Monitoring Center, 203 Armstrong Drive, Freeport, PA 16229,
Pretest Procedure 9.8
www.astmtmc.org. This edition incorporated revisions contained in all Information
Fifty-Hour Steady State Test 9.9
Letters through No. 12-1.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D5966 − 22
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