Suncor has agreements with Shell and ExxonMobil that authorize Suncor to use the Shell, Exxon, and Mobil brands at its own stores and sublicense these brands to our marketers, to whom Suncor supplies wholesale Shell, Exxon and Mobil branded fuels. Suncor has its own network of retail sites across Colorado, where we sell fuel products under the Shell, Exxon, and Mobil brands.
Suncor supplies about 35% of Colorado's gasoline and diesel fuel demand. We blend 10% ethanol into gasoline at our Commerce City refinery and sell it through our retail network. Ethanol as a fuel additive is mandated in certain parts of Colorado during the winter months.
Suncor Energy (U.S.A.) Inc. is an authorized licensee of the Shell, Exxon and Mobil brands and marks in the state of Colorado.