Blends of petroleum-based gasoline with 10% ethanol, commonly referred to as E10, account for more than 95% of the fuel consumed in motor vehicles with gasoline engines. Ethanol-blended fuels are one pathway to compliance with elements of the federal renewable fuel standard (RFS). The total volume of ethanol blended into motor fuels used in the United States has continued to increase since 2010, albeit at a declining rate of growth. Meanwhile, the use of ethanol-free gasoline (E0) by fuel consumers has declined. EIA tracks fuel components through data it collects from refiners, importers, large blending terminals, and ethanol producers. U.S. refiners produce large volumes of blendstocks for oxygenate blending (BOB) that are referred to as RBOB or CBOB depending on whether they are formulated to be blended with ethanol to make reformulated or conventional gasoline, respectively. Another distinct gasoline blendstock known […]