This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Effect of Fuel Composition on Lubricant Degradation Rates in a Spark Ignited Engine
Annotation ability available
Sector:
Language:
English
Abstract
The effect of pure fuels and several mixtures of pure fuels on lubricant degradation rates was determined by burning them in a CLR engine fitted with a Cu-Pb bearing and operated at high speeds and high crankcase temperatures. Oil degradation rates were measured by infrared analysis and the rate of corrosion of the Cu-Pb bearing by oil analysis for copper. Using a typical API-SD SAE 20 grade motor oil, fuels stressed the lubricant in the following decreasing order:
diisobutylene >isooctane >decene-1 >hexene-l >cumene >benzene = tert-butylbenzene >> xylenes >toluene. The lubricant responded to mixtures of these fuels in a manner predictable from the response to pure fuels. The generally low stresses applied to the lubricant by the aromatic fuels may be attributed, at least in part, to the antioxidant action of phenols formed during combustion. No mechanism was established for the markedly lower stresses observed with the methyl-substituted aromatics.
Recommended Content
Authors
Topic
Citation
McMahon, M. and Kreuz, K., "The Effect of Fuel Composition on Lubricant Degradation Rates in a Spark Ignited Engine," SAE Technical Paper 730780, 1973, https://doi.org/10.4271/730780.Also In
References
- Papa, L. J. Environmental Science and Technology April 1969
- Kabel, R. H. “An Engine Dynamometer Test Procedure For Evaluating Oil Thickening Characteristics.” SAE Transactions 79 1970 paper 700507
- Coleman, L. E. “Effect of Unleaded Gasoline on Exhaust Emission and Lubricant Performance.” Japanese Petroleum Institute October 1971
- Paggi, R. E. “High Temperature Thickening of Crankcase Motor Oils.” Lubrication 57 1971 7
- Mayo F. R. VanSickle, D. E. Stanford Research Institute Private communication
- Emanuel, N. M. Denison, E. T. Maizus, Z. K. “Liquid Phase Oxidation of Hydrocarbons.” New York: Plenum Press 1967
- First Annual Report CRC-APRAC February 1970