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    ASTM D8350 - 21

    Standard Test Method for Evaluation of Automotive Engine Oils in the Sequence IVB Spark-Ignition Engine

    Active Standard ASTM D8350 | Developed by Subcommittee: D02.B0

    Book of Standards Volume: 05.05

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    Significance and Use

    5.1 This test method was developed to evaluate automotive lubricant’s effect on controlling valve-train wear and overall engine wear for overhead camshaft engines with direct acting bucket lifters.

    5.2 Average intake lifter volume loss is used as a measure of an oil’s ability to prevent valve-train wear.

    5.3 End-of-test oil iron concentration is used as a measure of an oil’s ability to prevent overall engine wear.

    Note 2: This test method may be used for engine oil specifications such as API SP, and ILSAC GF- 6A, and GF-6B.

    1. Scope

    1.1 This test method measures the ability of an engine crankcase oil to control valve-train wear in spark-ignition engines at low operating temperature conditions. This test method is designed to simulate extended engine cyclic vehicle operation. The Sequence IVB Test Method uses a Toyota 2NR-FE water cooled, 4 cycle, in-line cylinder, 1.5 L engine. The primary result is bucket lifter wear. Secondary results include cam lobe nose wear and measurement of iron (Fe) wear metal concentration in the used engine oil. Other determinations such as fuel dilution of the crankcase oil, non-ferrous wear metal concentrations, total fuel consumption, and total oil consumption, can be useful in the assessment of the validity of the test results.2

    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, tubing, NPT screw threads/diameters, or single source equipment specified.

    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 throughout this document as necessary in each particular section.

    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.

    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    C534 Specification for Preformed Flexible Elastomeric Cellular Thermal Insulation in Sheet and Tubular Form

    D86 Test Method for Distillation of Petroleum Products and Liquid Fuels at Atmospheric Pressure

    D235 Specification for Mineral Spirits (Petroleum Spirits) (Hydrocarbon Dry Cleaning Solvent)

    D381 Test Method for Gum Content in Fuels by Jet Evaporation

    D445 Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)

    D525 Test Method for Oxidation Stability of Gasoline (Induction Period Method)

    D664 Test Method for Acid Number of Petroleum Products by Potentiometric Titration

    D2622 Test Method for Sulfur in Petroleum Products by Wavelength Dispersive X-ray Fluorescence Spectrometry

    D3244 Practice for Utilization of Test Data to Determine Conformance with Specifications

    D3525 Test Method for Gasoline Fuel Dilution in Used Gasoline Engine Oils by Wide-Bore Capillary Gas Chromatography

    D4052 Test Method for Density, Relative Density, and API Gravity of Liquids by Digital Density Meter

    D4175 Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants

    D4739 Test Method for Base Number Determination by Potentiometric Hydrochloric Acid Titration

    D5185 Test Method for Multielement Determination of Used and Unused Lubricating Oils and Base Oils by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES)

    D5191 Test Method for Vapor Pressure of Petroleum Products and Liquid Fuels (Mini Method)

    D5453 Test Method for Determination of Total Sulfur in Light Hydrocarbons, Spark Ignition Engine Fuel, Diesel Engine Fuel, and Engine Oil by Ultraviolet Fluorescence

    D6304 Test Method for Determination of Water in Petroleum Products, Lubricating Oils, and Additives by Coulometric Karl Fischer Titration

    E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications

    E84 Test Method for Surface Burning Characteristics of Building Materials

    E168 Practices for General Techniques of Infrared Quantitative Analysis

    ANSI Standard

    ANSI MC96.1-1975 Temperature MeasurementThermocouples

    GM Worldwide Engineering Standards

    GMW3420 Available from retailers, auto parts store Coolant Extended Life Ethylene Glycol (Health hazardsee appropriate SDS) ShellZone ShellZone is a registered trademark of Shell Trademark Management BV. Available from retailers, auto parts stores, or any Shell retailer / distributor. dex-cool 50/50 pre-diluted with de-ionized H2O meeting the specification for GMW3420, GM Worldwide Engineering Standard has been found satisfactory for this purpose.

    API Standard

    API 1509 Engine Oil Licensing and Certification System

    SAE Standards

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/D8350-21

    Citation Format

    ASTM D8350-21, Standard Test Method for Evaluation of Automotive Engine Oils in the Sequence IVB Spark-Ignition Engine, ASTM International, West Conshohocken, PA, 2021, www.astm.org

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