The oil will be delivered to the customers in March, April and May this year.
Petrol Ecuador has also sold 1.1 million barrels of Napo crude oil to Noble Americas, another US energy corporation.
Last year, Ecuador produced nearly 500,000 barrels of oil a day, of which Petro Ecuador and Petroamazonas, its two largest state-owned oil companies, accounted for 60 percent of the volume.
