Valero Energy Corporation operates as an independent petroleum refining and ethanol producing company in the United States, Canada, the United Kingdom, and Ireland. It operates through two segments, Refining and Ethanol. The company is involved in refining, marketing, and bulk sales activities. It produces conventional and premium gasolines, gasoline meeting the specifications of the California Air Resources Board (CARB), diesel fuels, low-sulfur and ultra-low-sulfur diesel fuels, CARB diesel fuels, distillates, jet fuels, asphalts, petrochemicals, lubricants, and other refined products. As of December 31, 2016, the company owned 15 petroleum refineries with a combined throughput capacity of approximately 3.1 million barrels per day. It markets its refined products through wholesale rack and bulk markets; and through approximately 7,400 outlets under the Valero, Diamond Shamrock, Shamrock, Ultramar, Beacon, and Texaco brand names. The company also produces and sells ethanol, distiller grains, and corn oil primarily to refiners and gasoline blenders, as well as to animal feed customers. It owns and operates 11 ethanol plants with a combined ethanol production capacity of approximately 1.4 billion gallons per year. In addition, it operates a 50-megawatt wind farm; convenience stores; gas stations; and truckstop and cardlock facilities, as well as engages in the credit card business.