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All-Year Commercial Oils
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Sector:
Event:
Fleet Week
Language:
English
Abstract
A method based on apparent viscosity of engine oils at 0°F measured by the cold cranking simulator to estimate minimum starting temperatures for SAE “W” numbered engine oils is described.
Based on apparent viscosity measurements, a nonpolymer-containing SAE 20W-30 engine oil would satisfy 100% of gasoline or diesel engine powered fleets where temperatures are consistently above 0°F. Based on climate and vehicle distribution by geographical location, about 15% of gasoline engine powered vehicles require engine oils with low-temperature properties found in SAE 5W or SAE 10W engine oils. Diesel engines using a nonpolymer-containing SAE 20W-30 engine oil would obtain the benefits of SAE 20W low-temperature starting properties and SAE 30 high-temperature protection.
Initial field tests of gasoline-powered vehicles in severe winter service indicate adequate low-temperature properties for a nonpolymer-containing SAE 20W-30 engine oil compared to an SAE 20W-20 grade normally used in this application in winter. This method may also be used to compare low-temperature properties of engine oils containing different V.I. improvers.
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Authors
Topic
Citation
Mullen, T., Lendener, W., and Frino, M., "All-Year Commercial Oils," SAE Technical Paper 740524, 1974, https://doi.org/10.4271/740524.Also In
References
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- “Engine Service Classifications and Guide to Crankcase Oil Selection.” sixth 1971 Washington, D.C. API Institute
- “Chek-Chart-1973 Lubrication Guide.” Chicago H. M. Gousha Co.
- Selby T. W. “A Comparison of the Effects of Cranking Speed and Oil Viscosity on Low Temperature Engine Starting.” Paper 805C presented at SAE Automotive Engineering Congress Detroit January 1964
- Vick G. K. “The Role of Engine Oil in Cold Weather Starting.” SAE Transactions 74 1966 paper 650446
- “1972 U. S. Motor Vehicle Registrations by States.” Philadelphia Automotive Industries 1973
- “Gas Engine Oil 20W-30 for LP and Natural-Gas Fueled Engines.” New York Mobil Oil Corp.
- Munsell M. W. “How Should the Low Temperature Viscosity of Multigraded Motor Oils be Determined.” Paper presented at 15th Annual Meeting IOCA Cleveland September 1962
- Nolf A. R. “Engine Oil Pumpability and Related Properties.” “Viscometry and its Application to Automotive Lubricants.” New York Society of Automotive Engineers, Inc. 1973 paper 730480
- “Proposed Method of Test for Dilution of Automotive Crankcase Oils at Reduced Pressure Distillation Method.”
- Stewart A. R. Spohn C. R. Meyer W. A. P. “Influence of Lubricating Oil Formulation on Winter Hot-Starting Engine Torque Requirements.” SAE Transactions 78 1969 paper 690157