Standard Test Method for Evaluation of Automotive Engine Oils in the Sequence IVB Spark-Ignition EngineTranslate name
STANDARD published on 1.9.2020
Designation standards: ASTM D8350-20
Publication date standards: 1.9.2020
The number of pages: 91
Approximate weight : 304 g (0.67 lbs)
Country: American technical standard
Category: Technical standards ASTM
cam lobe wear, crankcase oils, lubricants, valve-train wear,
|Significance and Use|
5.1ï¿½This test method was developed to evaluate automotive lubricantâ€™s effect on controlling valve-train wear and overall engine wear for overhead camshaft engines with direct acting bucket lifters.
5.2ï¿½Average intake lifter volume loss is used as a measure of an oilâ€™s ability to prevent valve-train wear.
5.3ï¿½End-of-test oil iron concentration is used as a measure of an oilâ€™s ability to prevent overall engine wear.
1.1ï¿½This 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, 1.5â€‰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
1.2ï¿½The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.2.1ï¿½Exceptionsâ€”Where there is no direct SI equivalent such as pipe fittings, tubing, NPT screw threads/diameters, or single source equipment specified.
1.3ï¿½This 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.
1.4ï¿½This 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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