The Iran conflict is pushing the United States toward becoming a net crude oil exporter for the first time since World War II.

The United States came close to becoming a net crude exporter last week for the first time since World War II, as exports surged to near-record levels to satisfy demand from Asia and Europe, where buyers were scrambling to replace Middle Eastern supplies disrupted by the Iran conflict. The war involving the U.S., Israel, and Iran caused an unprecedented shock to global energy markets, with threats to shipping through the Strait of Hormuz halting roughly 20% of global oil and gas flows. As a result, refiners in affected regions turned to alternative sources, significantly increasing demand for U.S. crude, though analysts note exports are nearing capacity limits.

Net U.S. crude imports dropped to just 66,000 barrels per day last week—the lowest level since records began in 2001—while exports rose to 5.2 million bpd, a seven-month high. Historically, the U.S. was last a net crude exporter in 1943. Strong export growth reflects how buyers in Europe and Asia are reaching further afield for supply, with price differences offsetting shipping costs. Countries like Greece have recently begun importing U.S. crude for the first time, and major buyers include the Netherlands, Japan, France, Germany, and South Korea. Nearly half of U.S. exports went to Europe, while Asia’s share has grown significantly.

Meanwhile, U.S. imports fell sharply, partly because domestic refineries rely on heavier crude than what the U.S. typically produces. A widening price gap—driven by a surge in Brent crude relative to West Texas Intermediate—has made U.S. oil more attractive overseas while reducing domestic demand for imports. Spot prices for crude deliveries to Europe and Africa have also hit record highs.

Despite strong demand, U.S. export growth is approaching logistical limits. Exports may average around 5.2 million bpd in April, close to the estimated maximum capacity of about 6 million bpd, constrained by pipeline infrastructure and tanker availability. Although releasing medium sour crude from strategic reserves could free up more light crude for export, higher shipping costs and limited tanker supply could dampen further growth. About 80 empty supertankers were reportedly heading to the Gulf of Mexico, likely to load crude in the coming weeks.