Standard Test Method for Evaluation of Automotive Engine Oils in the Sequence VIII Spark-Ignition Engine (CLR Oil Test Engine)
Standard Test Method for Evaluation of Automotive Engine Oils in the Sequence VIII Spark-Ignition Engine (CLR Oil Test Engine)
SIGNIFICANCE AND USE 5.1 This test method is used to evaluate automotive engine oils for protection of engines against bearing weight loss. 5.2 This test method is also used to evaluate the SIG capabilities of multiviscosity-graded oils. 5.3 Correlation of test results with those obtained in automotive service has not been established. 5.4 Use—The Sequence VIII test method is useful for engine oil specification acceptance. It is used in specifications and classifications of engine lubricating oils, such as the following: 5.4.1 Specification D4485. 5.4.2 API Publication 1509 Engine Oil Licensing and Certification System.7 5.4.3 SAE Classification J304. 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 Engin...
ASTM D6709-24 is a globally recognized standard published by ASTM International, focusing on the evaluation of automotive engine oils in the Sequence VIII Spark-Ignition Engine, also known as the CLR Oil Test Engine. This test method is designed specifically to assess the ability of engine oils, including single- and multi-viscosity grades (such as SAE 0W to 50), to protect spark-ignition gasoline engines under high-temperature and severe service conditions. The method addresses the oil’s effectiveness in minimizing bearing weight loss, as well as evaluating the viscosity stability (stay-in-grade capabilities) of multi-viscosity-graded oils.
The test is conducted under tightly controlled laboratory conditions using unleaded fuel and includes strictly defined protocols for engine operation, oil sampling, and determination of bearing wear. Although there is no established direct correlation to real-world automotive service results, ASTM D6709-24 is widely used in the engine oil industry for specification acceptance, classification, and comparison of oil performance.
ASTM D6709-24 is essential in several key areas of the automotive engine oils industry:
Другие стандарты ASTM
ASTM D6709-24 is one of several standards involved in the evaluation and specification of engine oils and fuels. Commonly referenced related standards include:
Keywords: ASTM D6709-24, automotive engine oils, Sequence VIII test, spark-ignition engine, CLR Oil Test Engine, engine oil testing, viscosity stability, bearing wear, stay-in-grade, reference oils, oil specification acceptance, engine oil classification, API, SAE, ASTM standards.