Determination of the R Factor for Fuel Economy Calculations Using Ethanol-Blended Fuels over Two Test Cycles
by C. Scott Sluder, C., Brian West, Aron Butler, Arvon L. Mitcham, et al. (SAE) During the 1980s, the U.S. Environmental Protection Agency (EPA) incorporated the R factor into fuel economy calculations in order to address concerns about the impacts of