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Performance of Multigrade Oils in Heavy-Duty Diesel and Gasoline Engines
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Abstract
Results are presented showing that through judicious choice of additive and base stock components, multigrade heavy-duty oils can be formulated to match the performance of single-grade oils with regard to cleanliness and durability. However, there are a number of benefits inherent with multi-grade heavy-duty oils because of their viscosity-temperature characteristics. Foremost among these is the ability of SAE 20W/40 oils to provide the improved starting characteristics of an SAE 20W grade oil while maintaining the oil consumption control provided by an SAE 30 grade oil. To the operator, this means decreased manpower requirements for cold weather starting, decreased use of starting aids, increased unit availability, and longer battery and starter-motor life. Still another inherent benefit is improved fuel economy; gains range from essentially zero in warmed up line-haul operation to as much as about 10% in severe stop-and-go city operation where engines operate a significant percentage of the time at less than warmed up conditions.
The overall economics of heavy-duty multigrade oils vary from fleet to fleet, and can be evaluated only in the light of the particular operation. However, the increasing trend toward the use of such oils suggests that more and more operators are finding the economics to be favorable.
Authors
Citation
Bame, J. and Coon, J., "Performance of Multigrade Oils in Heavy-Duty Diesel and Gasoline Engines," SAE Technical Paper 670956, 1967, https://doi.org/10.4271/670956.Also In
References
- Horowitz H. H. Vick G. K. “Low Temperature Cranking and Flow Properties of Waxy, Polymer-Thickened Motor Oils.” SAE Transactions 70 1962
- Selby T. W. “Low-Temperature Behavior of Motor Oils -- A Study of the Dependence of Cranking Speed on Motor Oil Viscosity.” SAE Progress in Technology 10 “The Role of Engine Oil Viscosity on Low Temperature Cranking and Starting.” 1966
- Fischl F. B. Horowitz H. H. Tutwiler T. S. “Cold Starting with Vl-Improved Multigrade Oils.” SAE Transactions 64 1956 608 Also SAE Progress in Technology, Vol. 10. The Role of Engine Oil Viscosity on Low Temperature Cranking and Starting.” 1966
- U. S. Patent No. 3, 265, 619 Malone B. W. Coon J. S. 1966
- West J. P. Selby T. W. “Multigrade Oils Lose Viscosity with Time and Engine Speed.” SAE Journal 74 March 1966 42
- Vick G. K. “The Role of the Engine Oil in Cold Weather Starting.” SAE Transactions 74 1966 650446 Also SAE Progress in Technology, Vol. 10, “The Role of Engine Oil Viscosity in Low Temperature Cranking and Starting.” 1966
- Horowitz H. H. “Predicting Effects of Temperature and Shear Rate on Viscosity of Viscosity Index-Improved Lubricants.” Indust. Engrg. Chemistry 50 1958 1089
- Okrent E. H. “Engine Friction and Bearing Wear.” ASLE Transactions 4 1961 47
- Vick G. K. Meyer W. A. P. Selby T. W. “Prediction of the Low-Temperature Cranking Characteristics of Engine Oils by Use of Laboratory Viscometers.” SAE Transactions 74 1966 650441 SAE Progress in Technology 10 “The Role of Engine Oil Viscosity in Low Temperature Cranking and Starting.” 1966
- Pettit C. W. Cameron G. L. “Cranking Motor Requirements.” SAE Transactions 74 1966 660012
- Selby T. W. “A Comparison of the Effects of Cranking Speed and Oil Viscosity on Low-Temperature Engine Starting.” SAE Progress in Technology 10 “The Role of Engine Oil Viscosity in Low Temperature Cranking and Starting.” 1966
- Courtney R. L. “Some Effects of Crankcase Lubricant Viscosity on Engine Operation.” 660541 SAE West Coast Meeting Los Angeles August 1966
- Davis L. L. Best R. D. “The Effect of Volatility on Oil Consumption.” ASTM Proc 35 Part II 1935 608
- Overcash R. L. Hart W. McClure D. J. “How Do Volatility, Viscosity and VI-Improvers Affect Oil Consumption?” SAE Annual Meeting Detroit January 1956
- Coon J. S. Loeffler D. E. “Routes of Crankcase Oil Loss.” SAE Transactions 67 1959 69
- Miller Jr. J. A. Hartmann L. M. “Multigrade Crankcase Lubricants.” Paper presented at SAE Summer Meeting Atlantic City June 1954
- Moore C. C. Kent W. L. Lakin W. P. “Multi-grade Oils for Improved Performance.” Paper presented at SAE West Coast Meeting Los Angeles August 1954
- Bidwell J. B. Williams R. K. “New Look in Lubricating Oils.” SAE Transactions 63 1955 349
- Gates V. A. Bergstrom R. F. Hodgson T. Wendt L. A. “On the Spot Testing of Used Lubricating Oils.” Paper presented at SAE West Coast Meeting August 1955
- Bruce R. E. Lewis R. J. “Our Experience in Using an Oil Analysis Program.” SAE Heavy Duty Vehicle Meeting Milwaukee September 1961