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For the first time, the United States has become a net exporter of oil. What factors have driven thi

The US Energy Information Administration (EIA) said on Friday that the world's largest oil producer and oil consumer exported 89000 barrels more crude oil and refined oil per day than imports in September, the first time that the oil trade surplus has lasted for a full month since the 1940s. In contrast, 10 years ago, imports exceeded exports by 12 million barrels a day.

Data show that in September this year, U.S. oil exports rose 18% year-on-year, with an average of about 8.76 million barrels a day; Oil imports fell by 12% year-on-year, with an average of about 8.67 million barrels a day and a surplus of nearly 90000 barrels.

This shift has been driven by a number of factors: a surge in shale oil production, the end of the crude oil export ban in 2015, and improved automotive fuel economy have limited gasoline demand - even though road travel has rebounded from the downturn during the recession.

The monthly report released by the International Energy Agency in September showed that in June this year, the United States once surpassed Saudi Arabia to become the world's largest crude oil exporter. U.S. media reported at the end of last year that the United States once became a net exporter of crude oil, breaking the continuous dependence on imported crude oil over the past 70 years. However, the report did not say how long the surplus lasted.