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Effect of Unleaded Fuel and Exhaust Gas Recirculation on Sludge and Varnish Formation
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English
Abstract
Based on evaluations of sludge and varnish performance in a modified Sequence V-C procedure, it would appear that reduced lead levels in gasoline and the use of EGR hardware will place at least as great a demand on lubricants as is the case today. Analysis of sludge from representative tests indicated that the total amount of sludge formed from unleaded fuel was essentially the same as when leaded fuel was used. Hence, it does not seem likely that engine oil drain intervals of the future can be lengthened.
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Authors
Citation
Stambaugh, R., Kopko, R., and Franklin, T., "Effect of Unleaded Fuel and Exhaust Gas Recirculation on Sludge and Varnish Formation," SAE Technical Paper 720944, 1972, https://doi.org/10.4271/720944.Also In
References
- Thompson A. L. “Buick's 1972 Exhaust Gas Recirculation System.” Paper 720519 SAE National Automobile Engineering Meeting Detroit May 1972
- Pless L. G. “Some Effects of Experimental Vehicle Emission Control Systems on Engine Deposits and Wear.” SAE Transactions 80 1971 paper 710583
- Fuchs E. J. “Unleaded versus Leaded Fuel Results in Laboratory Engine Tests.” Paper 710676 SAE National West Coast Meeting Vancouver August 1971
- Crouse W. W. Johnson R. H. Reiland W. H. “Effect of Unleaded Fuel on Lubricant Performance.” Paper 710584 SAE Mid-Year Meeting Montreal June 1971
- Gerber A. F. Smith, R. G. Jr. “Some Effects of Exhaust Gas Recirculation Upon Automotive Engine Intake System Deposits and Crankcase Lubricant Performance.” Paper 710142 SAE Automotive Engineering Congress Detroit January 1971
- Glass W. et al. “Evaluation of Exhaust Recirculation for Control of Nitrogen Oxides Emissions.” SAE Transactions 79 1970 paper 700146
- Dimitroff E. Quillian, R. D. Jr. “Low Temperature Engine Sludge-What? Where? How?” SAE Transactions 74 1966 paper 650255
- Geyer J. “The Mechanism of Deposit Formation and Control in Gasoline Engines.” Amer. Chem. Soc. Div. of Petroleum Chemistry, Inc. 14 4 A15 A23 1969
- Coran A. Y. Vineyard B. D. “Gasoline Engine Deposition: II. Sludge Binder.” Amer. Chem. Soc. Div. of Petroleum Chemistry, Inc. 14 4 A35 A44 1969
- Frassa K. A. Sarkis A. B. “Diesel Engine Condition Through Oil Analysis.” SAE Transactions 77 1968 paper 680759
- Pahnke A.J. Bettoney W. E. “Role of Lead Antiknocks in Modern Gasolines.” SAE Transactions 80 1971 paper 710842
- Brand J. C. D. Stevens I. D. R. “Mechanism and Stereochemistry of the Addition of Nitrogen Dioxide to Olefins.” J. Chem. Soc. 1958 629 638
- Shechter H. “The Chemistry and Mechanisms of Reactions of Oxides of Nitrogen and Olefins.” Rec. Chem. Prog. 25 1964 55 76
- Vineyard B. D. Coran A. Y. “Gasoline Engine Deposition: I. Blowby Collection and Identification of Deposit Precursors.” Amer. Chem. Soc. Div. of Petroleum Chemistry, Inc. 14 4 A25 A32 1969