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E85 and fuel efficiency: An empirical analysis of 2007 EPA test data

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  • Roberts, Matthew C.

Abstract

It is well known that ethanol has less energy per unit volume than gasoline. Differences in engine design and fuel characteristics affect the efficiency with which the chemical energy in gasoline and ethanol is converted into mechanical energy, so that the change in fuel economy may not be a linear function of energy content. This study analyzes the fuel economy tests performed by the US Environmental Protection Agency (EPA) on 2007 model year E85-compliant vehicles and finds that the difference in average fuel economy is not statistically different from the differential in energy content.

Suggested Citation

  • Roberts, Matthew C., 2008. "E85 and fuel efficiency: An empirical analysis of 2007 EPA test data," Energy Policy, Elsevier, vol. 36(3), pages 1233-1235, March.
    • Handle: RePEc:eee:enepol:v:36:y:2008:i:3:p:1233-1235
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    1. Amani Elobeid & Simla Tokgoz & Dermot J. Hayes & Bruce A. Babcock & Chad E. Hart, 2006. "Long-Run Impact of Corn-Based Ethanol on the Grain, Oilseed, and Livestock Sectors: A Preliminary Assessment, The," Center for Agricultural and Rural Development (CARD) Publications 06-bp49, Center for Agricultural and Rural Development (CARD) at Iowa State University.
    2. Ian W. H. Parry & Kenneth A. Small, 2005. "Does Britain or the United States Have the Right Gasoline Tax?," American Economic Review, American Economic Association, vol. 95(4), pages 1276-1289, September.
    3. Vedenov, Dmitry & Wetzstein, Michael, 2008. "Toward an optimal U.S. ethanol fuel subsidy," Energy Economics, Elsevier, vol. 30(5), pages 2073-2090, September.
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    1. Aguilar, Francisco X. & Cai, Zhen & Mohebalian, Phillip & Thompson, Wyatt, 2015. "Exploring the drivers' side of the “blend wall”: U.S. consumer preferences for ethanol blend fuels," Energy Economics, Elsevier, vol. 49(C), pages 217-226.
    2. Whitehead, Jake & Franklin, Joel P. & Washington, Simon, 2015. "Transitioning to energy efficient vehicles: An analysis of the potential rebound effects and subsequent impact upon emissions," Transportation Research Part A: Policy and Practice, Elsevier, vol. 74(C), pages 250-267.
    3. Gallagher, Paul W. & Sleper, Daniel, 2016. "The market and consumer welfare effects of mid-level ethanol blends in the US fuel market," Energy Policy, Elsevier, vol. 98(C), pages 149-159.

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