Engine Oil Viscosity Classification Low-Temperature Requirements - Current Status and Future Needs / JA. Spearot
- Conference Author:
- Low Temperature Lubricant Rheology Measurement and Relevance to Engine Operation (1991 : Austin, TX)
- Physical Description:
- 1 online resource (21 pages) : illustrations, figures, tables
- Additional Creators:
- Spearot, JA., American Society for Testing and Materials, and ASTM International
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- The evolution of low-temperature viscosity requirements in the Engine Oil Viscosity Classification, SAE J300, began in 1923 with the introduction of simple limits on the pour point of selected viscosity grades. Since then, low-temperature requirements have evolved into a complex specification system that includes a separate designation (i.e., the ¿̐ưW-grades¿̐ư), laboratory ¿̐ưcranking¿̐ư and ¿̐ưpumping¿̐ư simulators, and complex cooling cycles to which an oil must be subjected prior to measurement. These requirements have been incorporated into SAE J300 with the objective of improving its ability to specify the oil properties necessary for good engine starting and operation at low-temperatures. The current lack of field problems related to low-temperature operation of both light- and heavy-duty vehicles provides one indication of the success with which SAE J300 meets this objective. However, the last decade has witnessed significant changes in engine design to meet more stringent emissions and fuel economy regulations. For this reason, it is time for the industry to re-evaluate the low-temperature viscosity specifications in J300 to determine if they represent the optimum values needed for modern engine designs.
- Dates of Publication and/or Sequential Designation:
- Volume 1992, Issue 1143 (January 1992)
- 9780803152014 (e-ISBN)
- Digital File Characteristics:
- text file PDF
- Bibliography Note:
- Includes bibliographical references 17.
- Other Forms:
- Also available online via the World Wide Web. Tables of contents and abstracts freely available; full-text articles available by subscription.
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- Reproduction Note:
- Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 1992. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.
- Technical Details:
- Mode of access: World Wide Web.
- Source of Acquisition:
- ASTM International PDF Purchase price USD25.
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