U.S. oil reserve hits lowest level since Reagan era as Iran conflict drains emergency stockpile

The United States has been quietly draining its emergency oil stockpile for months to blunt the price pain of its conflict with Iran — and the buffer is running thin. The Strategic Petroleum Reserve, the world's largest government-owned emergency crude stockpile, fell to 319.5 million barrels in the week ending July 3, its lowest level since the Reagan administration, according to the Department of Energy. By late September 2026, it had dropped further to approximately 284.6 million barrels — just 40 percent of its 714 million barrel capacity, according to Energy Information Administration data.

The drawdown began in early March, when the U.S. first tapped the reserve following initial strikes on Iran, in coordination with the International Energy Agency, a coalition of 28 countries that supports energy supply security. It has continued since. The practical consequence for ordinary Americans showed up fast at the pump: on February 28, the day the U.S. and Israel first struck Iran, a gallon of gasoline averaged $2.98. By mid-May it had climbed to $4.48, according to the American Automobile Association.

Historically, strategic reserves are meant to be a short-term solution to buy governments time to deal with the situation, rather than a silver bullet or a complete solution. The longer a crisis goes on, the less flexibility governments have with their strategic reserves.— Maksim Sonin, energy executive, Stanford University's Center for Fuels of the Future

President Trump acknowledged the dynamic himself, telling reporters on Wednesday that anytime the U.S. strikes Iran, oil prices jump. They did: Brent crude futures settled at $78.02 a barrel that day, up 5.2 percent, topping their highest level since June 19.

The SPR was created in 1975 after the Arab oil embargo, when Middle Eastern producers restricted exports to the U.S., causing severe fuel shortages. Hundreds of millions of barrels are stored in underground salt caverns at four locations along the Gulf Coast in Texas and Louisiana. The reserve can release up to 4.4 million barrels per day during emergencies and can reach nearly half of all U.S. oil refineries via interstate pipelines or barges. At full capacity, it holds roughly two months' worth of total U.S. crude imports.

Many Americans assume that because the U.S. now produces more oil than any country in the world and is a net exporter of petroleum products, foreign conflicts can't touch their energy costs. That assumption is wrong. Crude oil is not priced based on where it was produced — it trades on global benchmarks that reflect worldwide supply and demand.

Independence doesn't mean price security or price independence because oil is a globally traded commodity and all markets are interrelated.— Maksim Sonin, energy executive, Stanford University's Center for Fuels of the Future

The mechanism is straightforward: roughly one-fifth of global oil supply passes through the Strait of Hormuz, the narrow waterway connecting the Gulf to the Gulf of Oman. When shipping there is disrupted, countries that depend heavily on those flows — including U.S. allies South Korea and India — must find replacement barrels elsewhere, bidding against buyers worldwide. That competition tightens global supply and pushes benchmark prices higher, raising costs for U.S. refiners and, ultimately, consumers — even though only about 7 percent of the crude oil consumed in the U.S. travels through the strait.

The ripple effects go well beyond the gas station. Airlines pay more for jet fuel. Trucking companies spend more on diesel, driving up the cost of moving food. Those higher transportation costs are passed along to consumers through more expensive groceries, goods, and travel.

It's for shocks like this; it's for conflict, major overseas disruptions, outages, and whatnot. That's the point of it. The point is to have a buffer, an emergency fund, to help buffer prices and prevent supplies from being disrupted.— Abhi Rajendran, non-resident fellow, Rice University's Center for Energy Studies

But Rajendran also flagged the sustainability problem: the U.S. has been pulling oil from storage, including the SPR, and exporting it to help balance the global market. "That's not necessarily sustainable for a very long period of time," he said. With the reserve now at 40 percent of capacity and still being drawn down — off another 0.4 million barrels in the most recent week, according to EIA data — the government's room to maneuver in any future crisis has narrowed considerably.

Roughly 60 percent of the crude oil refined in the U.S. comes from domestic production. Of the remaining 40 percent that is imported, about 60 percent comes from Canada and another 7 percent from Mexico, according to Al Jazeera. Whether oil from other sources — including Venezuela, which has been floated as a potential supplier to help replenish the reserve — can meaningfully refill the stockpile remains an open question as the conflict with Iran continues.

Why it matters — With the SPR at its lowest level in four decades and still falling, the U.S. government has significantly less capacity to cushion consumers from the next oil price shock — whether from an escalation with Iran, a hurricane, or any other crisis.

Reported by oilpriceapi.com, reuters.com, aljazeera.com