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Unleaded Gasoline - Lubricant Requirements and Fuel Additive Performance
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1972 by SAE International in United States
Annotation ability available
Event: National West Coast Meeting
Unleaded gasoline was used in a 30 car, 48,000 mile taxicab field test to study the effects of a deposit control (DC) gasoline additive and lubricating oil additives on engine deposits, wear, and other variables. The unleaded gasoline performed as well as or better than a leaded gasoline in this test when both gasolines contained the DC additive. Engine deposits were comparable, and wear and corrosion were reduced when unleaded gasoline was used.
With unleaded gasoline, we found motor oils need a high level of ashless dispersant to obtain maximum varnish control. Also, in these test engines, an ashless oil gave the same wear protection with unleaded gasoline that an SE-type oil gave with leaded gasoline.
A highly effective DC gasoline additive minimized carburetor, intake valve, and crankcase deposits with unleaded gasoline. This agreed with the effective performance that this additive had previously shown in leaded gasoline service. Also, unleaded fuel with the DC additive used with a nondispersant crankcase oil performed similarly to a nonadditive unleaded fuel used with an SE-type oil in the control of engine sludge and varnish.
CitationOrrin, D., Miner, W., and Kipp, K., "Unleaded Gasoline - Lubricant Requirements and Fuel Additive Performance," SAE Technical Paper 720689, 1972, https://doi.org/10.4271/720689.
- Weaver E. E. “Effects of Tetraethyl Lead on Catalyst Life and Efficiency in Customer-Type Vehicle Operation.” Paper 690016 SAE Automotive Engineering Congress Detroit January 1969
- Leikkanen H. E. Beckman E. W. “The Effect of Leaded and Unleaded Gasolines on Exhaust Emissions as Influenced by Combustion Chamber Deposits.” (Report of CRC-APRAC Project Cape-3-68), SAE Transactions 80 1971 paper 710843
- Schwing R. C. “The Effects of TEL on Oxidation in an Exhaust Manifold Reactor-A Single-Cylinder Engine Study.” SAE Transactions 80 1971 paper 710844
- Musser G. S. Wilson J. A. Hyland R. G. Ashby H. A. “Effectiveness of Exhaust Gas Recirculation with Extended Use.” Paper 710013 SAE Automotive Engineering Congress Detroit January 1971
- Pless L. G. “Some Effects of Experimental Vehicle Emission Control Systems on Engine Deposits and Wear.” SAE Transactions 80 1971 paper 710583
- Doelling R. P. “An Engine's Definition of Unleaded Gasoline.” Paper 710841 SAE National Combined Fuels and Lubricants, Powerplant and Truck Meetings St. Louis October 1971
- Pahnke A. J. Conte J. F. “Effect of Combustion Chamber Deposits and Driving Conditions on Vehicle Exhaust Emissions.” Paper 690017 SAE Automotive Engineering Congress Detroit January 1969
- Gagliardi J. C. Ghannam F. E. “Effects of Tetraethyl Lead Concentration on Exhaust Emissions in Customer-Type Vehicle Operation.” Paper 690015 SAE Automotive Engineering Congress Detroit January 1969
- Felt A. E. Kerley R. V. “Engines and Effects of Lead-Free Gasoline.” Paper 710367 SAE Mississippi Valley Section October 1970
- Forster E. J. Stinson L. E. “Effects of Leaded versus Unleaded Gasolines on Stabilized Octane Requirements.” Paper presented at National Petroleum Refiners Assoc. National Fuels and Lubricants Meeting New York September 10-11 1970
- 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
- Kent W. L. Finnigan F. T. “The Effect of Some Fuel and Operating Parameters on Exhaust Valve Seat Wear.” Paper 710673 SAE National West Coast Meeting Vancouver August 1971
- Giles W. “Valve Problems with Lead Free Gasoline.” SAE Transactions 80 1971 paper 710368
- Gallopoulos N. E. “Projected Lubricant Requirements of Engines Operating with Lead-Free Gasoline.” SAE Transactions 80 1971 paper 710585
- Gray D. S. Azhari A. G. “Saving Maintenance Dollars with Lead-Free Gasoline.” Paper 720084 SAE Automotive Engineering Congress Detroit January 1972
- Bigley, H. A. Jr. Keller B. D. Kloppe M. G. “Octane Requirement Increase in 1971 Model Cars with Leaded and Unleaded Gasolines (Report of a Pilot Program of the Road Test Group of the Motor Vehicle Fuel, Lubricant, & Equipment Research Committee of the Coordinating Research Council, Inc.).” Paper 710675 SAE National West Coast Meeting Vancouver August 1971
- Hall C. A. Felt A. E. Brown W. J. “Evaluating Effects of Fuel Factors on Stabilized Exhaust Emission Levels.” Paper 690014 SAE Automotive Engineering Congress Detroit January 1969
- Kipp K. L. Ingamells J. C. Richardson W. L. Davis C. E. “Ability of Gasoline Additives to Clean Engines and Reduce Exhaust Emissions.” Paper 700456 SAE Mid-Year Meeting Detroit May 1970
- Houser D. W. Irwin R. F. Painter L. J. Amberg G. H. “Field Tests Show Gasoline Deposit Control Additives Effective in Emission Reduction.” APCA Paper 71-83 64th Annual Meeting of Air Pollution Control Assoc. Atlantic City June 27 July 1 1971
- Scheffé H. “The Analysis of Variance.” New York John Wiley and Sons 1959