Compañía Mexicana de Petróleo El Águila SA, (El Águila for short, called in English the Mexican Eagle Oil Company or Mexican Eagle Petroleum Corporation, was a Mexican oil company in the 20th century. The company, established in 1909, produced and commercialised gasoline and lubricants until it was absorbed by the Royal Dutch Shell in 1959.

Shell plc is a British multinational oil and gas company headquartered in London, England. Shell is a public limited company with a primary listing on the London Stock Exchange (LSE) and secondary listings on Euronext Amsterdam and the New York Stock Exchange. A core component of Big Oil, Shell is the second largest investor-owned oil and gas company in the world by revenue, and among the world's largest companies out of any industry. Measured by both its own emissions, and the emissions of all the fossil fuels it sells, Shell was the ninth-largest corporate producer of greenhouse gas emissions in the period 1988–2015.