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  • ASTM
    D6709-21a Standard Test Method for Evaluation of Automotive Engine Oils in the Sequence VIII Spark-Ignition Engine (CLR Oil Test Engine)
    Edition: 2021
    $148.51
    Unlimited Users per year

Description of ASTM-D6709 2021

ASTM D6709-21a

Active Standard: Standard Test Method for Evaluation of Automotive Engine Oils in the Sequence VIII Spark-Ignition Engine (CLR Oil Test Engine)




ASTM D6709

Scope

1.1 This test method covers the evaluation of automotive engine oils (SAE grades 0W, 5W, 10W, 20, 30, 40, and 50, and multi-viscosity grades) intended for use in spark-ignition gasoline engines. The test procedure is conducted using a carbureted, spark-ignition Cooperative Lubrication Research (CLR) Oil Test Engine (also referred to as the Sequence VIII test engine in this test method) run on unleaded fuel. An oil is evaluated for its ability to protect the engine and the oil from deterioration under high-temperature and severe service conditions. The test method can also be used to evaluate the viscosity stability of multi-viscosity-graded oils. Companion test methods used to evaluate engine oil performance for specification requirements are discussed in the latest revision of Specification D4485.

1.2 Correlation of test results with those obtained in automotive service has not been established. Furthermore, the results obtained in this test are not necessarily indicative of results that will be obtained in a full-scale automotive spark-ignition or compression-ignition engine, or in an engine operated under conditions different from those of the test. The test can be used to compare one oil with another.

1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.3.1 Exceptions—The values stated in inch-pounds for certain tube measurements, screw thread specifications, and sole source supply equipment are to be regarded as standard.

1.3.1.1 The bearing wear in the text is measured in grams and described as weight loss, a non-SI term.

1.4 This test method is arranged as follows:

Subject

Section

Introduction

 

Scope

1

Referenced Documents

2

Terminology

3

Summary of Test Method

4

 

Before Test Starts

4.1

 

Power Section Installation

4.2

 

Engine Operation (Break-in)

4.3

 

Engine Operation (Test/Samples)

4.4

 

Stripped Viscosity

4.5

 

Test Completion (BWL)

4.6

Significance and Use

5

 

Evaluation of Automotive oils

5.1

 

Stay in Grade Capabilities

5.2

 

Correlation of Results

5.3

 

Use

5.4

Apparatus

6

 

Test Engineering, Inc.

6.1

 

Fabricated or Specially Prepared Items

6.2

 

Instruments and Controls

6.3

 

Procurement of Parts

6.4

Reagents and Materials

7

 

Reagents

7.1

 

Cleaning Materials

7.2

 

Expendable Power Section-Related Items

7.3

 

Power Section Coolant

7.4

 

Reference Oils

7.5

 

Test Fuel

7.6

Test Oil Sample Requirements

8

 

Selection

8.1

 

Inspection

8.2

 

Quantity

8.3

Preparation of Apparatus

9

 

Test Stand Preparation

9.1

 

Conditioning Test Run on Power Section

9.2

 

General Power Section Rebuild Instructions

9.3

 

Reconditioning of Power Section After Each Test

9.4

Calibration

10

 

Power Section and Test Stand Calibration

10.1

 

Instrumentation Calibration

10.2

 

Calibration of AFR Measurement Equipment

10.3

 

Calibration of Torque Wrenches

10.4

Engine Operating Procedure

11

 

Run-In and Flush

11.1

 

Test Operating Conditions

11.2

 

Air-Fuel Ratio and Spark Advance

11.3

 

Air, Off-Gas and Blowby Measurement

11.4

 

Unscheduled Shutdowns

11.5

 

Oil Sampling and Oil Addition

11.6

 

Periodic Measurements

11.7

 

Final Oil Drain and Oil Consumption Computation

11.8

 

Operational Validity Criteria

11.9

 

Test Completion

11.10

Determination of Test Results

12

 

Oil Analysis

12.1

 

Test Bearing Weight Loss Determination

12.2

Report

13

Precision and Bias

14

 

Precision

14.1

 

Bias

14.2

Use of ASTM Rounding

15

Keywords

16

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

Measurement of Connecting Rod Bearing Clearance and
Journal Taper

Annex A5

Measurement of Main Bearing Clearance

Annex A6

Measurement of Piston-to-Sleeve Clearance

Annex A7

Control Chart Technique for a Laboratory's Severity
Adjustment (SA)

Annex A8

Recommended New Liner Honing Procedure

Annex A9

Sequence VIII Oil Priming Procedure

Annex A10

Alternative Crankcase Breather Configuration

Annex A11

Connecting Rod Bearing Cleaning Procedure

Annex A12

Electronic Ignition Conversion

Annex A13

System Response Procedure

Annex A14

Air-Fuel Ratio Measurement

Annex A15

Lead Decontamination Procedure

Annex A16

Crankshaft Rear Seal Conditioning

Annex A17

Report Forms and Data Dictionary

Annex A18

Test Fuel Specification

Annex A19

APPENDIXES

Suggested Method for Salvaging Camshaft Bearing Journals

Appendix X1

Data Log Sheets

Appendix X2

1.5 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 precautionary statements are provided throughout this test method.

1.6 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.


Keywords

bearing weight loss; CLR oil test engine; copper-lead bearings; engine oil; oil consumption; Sequence VIII test; shear stability;


ICS Code

ICS Number Code 75.100 (Lubricants, industrial oils and related products)


DOI: 10.1520/D6709-21A

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ASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide.
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