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Low Temperature Rheological Properties of Aged Crankcase Oils
Technical Paper
2000-01-2943
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The low-temperature pumpability of engine oil throughout the engine at startup is an important property. Insuring that fresh oils can be pumped at low temperatures has been a requirement of crankcase lubricants for approximately two decades. Extending the assurance of the oil's low temperature pumpability as it ages under engine operation has been the concern of car manufacturers and lubricant marketers for some time. In order to determine the factors influencing the aged oil's low temperature pumpability, we have undertaken a fleet test. We found that as lubricants are aged, excellent low temperature pumping properties can be maintained if lubricants are formulated with viscosity-index improvers incapable of forming polymer networks, base oils with a low tendency to form wax networks, effective pour-point depressants, and if oil drain intervals are not extended beyond the performance limitations of the specific lubricant category.
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Authors
- Michael A. Batko - DaimlerChrysler Inc.
- Dennis W. Florkowski - DaimlerChrysler Inc.
- Mark T. Devlin - Ethyl Petroleum Additives Inc.
- Shoutian Li - Ethyl Petroleum Additives Inc.
- David W. Eggerding - Ethyl Petroleum Additives Inc.
- William Y. Lam - Ethyl Petroleum Additives Inc.
- Thomas F. McDonnell - Ethyl Petroleum Additives Inc.
- Tze-Chi Jao - Ethyl Petroleum Additives Inc.
Citation
Batko, M., Florkowski, D., Devlin, M., Li, S. et al., "Low Temperature Rheological Properties of Aged Crankcase Oils," SAE Technical Paper 2000-01-2943, 2000, https://doi.org/10.4271/2000-01-2943.Also In
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