Octane Numbers of Ethanol− and Methanol−Gasoline Blends Estimated from Molar Concentrations

When expressed using volumetric concentrations (as is industry practice), the addition of relatively small amounts of ethanol or methanol (e.g., 10% by volume) to gasoline appears to result in disproportionately large, nonlinear increases in research octane number (RON) and motor octane number (MON)... View More