Where does Mexico get its gasoline from?

The national oil company PEMEX is Mexico's largest gasoline refiner; however, PEMEX's six domestic refineries process only about two-thirds of the gasoline consumed in Mexico.[254] To cover domestic demand, in recent years Mexico has increasingly purchased gasoline on the open market (mainly to US exporters such as Valero, Marathon, Tesoro, ExxonMobil[255]). In September 2017 President Enrique Peña Nieto authorized private companies to import gas.