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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.)
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Abstract
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.
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Citation
Bigley, 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.Also In
References
- “Influence of Leaded and Unleaded Fuels on Octane Requirement Increase in 1971 Model Cars: 20-Car Pilot Program at Southwest Research Institute.” Coordinating Research Council Report No. 445 June 1971
- Sanders F. J. Scott E. H. “Seasonal Octane Control.” Paper 127-T SAE National Fuels and Lubricants Meeting Chicago October 1959
- Ingamells J. C. Stone R. K. Gerber N. H. Unzelman G. H. “Effects of Atmospheric Variables on Passenger Car Octane Number Requirements.” Paper 66-9 SAE West Coast Meeting Los Angeles August 1966
- Brinegar C. S. Miller R. R. “Statistical Estimation of the Gasoline Octane Number Requirement of New Model Automobiles.” Technometrics 2 1 February 1960
- “Octane Number Requirement Survey, 1969.” Coordinating Research Council Report No. 434 September 1970