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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, and Equipment Research Committee of the Coordinating Research Council, Inc.)
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1971 by SAE International in United States
Annotation ability available
During the fall and winter of 1970-1971, the Coordinating Research Council (CRC) contracted with Southwest Research Institute for the latter to conduct a pilot program on 10 pairs of 1971 model cars to compare the influence of leaded and unleaded fuels on octane requirement increase (ORI). The cars were operated for 8,000-10,000 miles in the San Antonio area using a prescribed city-suburban driving schedule. One car of each pair was run on a commercially available leaded gasoline of 93 Research octane number (ON) and the other on a specially prepared unleaded fuel of similar quality. Differences in ORI for the two fuels ranged from 0-3.5 ON within car pairs. The average ORI of 4.0 ON for leaded fuel cars and 4.6 ON for unleaded fuel cars was not significantly different above the 80% confidence level.
CitationBigley, H., Keller, B., and Kloppe, M., "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, and Equipment Research Committee of the Coordinating Research Council, Inc.)," SAE Technical Paper 710675, 1971, https://doi.org/10.4271/710675.
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