America's Oil Buffer Hits Breaking Point

The U.S. Strategic Petroleum Reserve dropped 9.9 million barrels in the week ended May 15. That is the largest single-week decline in the reserve's history, according to Standard Chartered analysts. Total stockpiles now sit at 374 million barrels—approaching what the bank calls "operational stress limits" and less than half the 621 million barrels held in September 2021.

The drawdown is part of a coordinated global response to the Iran crisis. In March, the 32 member countries of the International Energy Agency pledged to release 400 million barrels from their strategic reserves—more than double the 182.7 million barrels released during the 2022 Ukraine war response, OilPrice.com reported. The United States committed to 172 million barrels of that total. But the pace of withdrawals has accelerated sharply. The physical infrastructure of the SPR limits withdrawal capacity to a maximum rate of 4.4 million barrels per day, with a statutory operational minimum of 150 million barrels, Standard Chartered noted. At current depletion rates, the reserve could approach that floor within months if the Hormuz blockade persists.

President Trump campaigned on refilling the reserve after heavy Biden-era sales. Five months into his second term, the tank is moving the other way. Energy Secretary Chris Wright promised in mid-May that the administration would replace every barrel withdrawn—plus 20 percent more. "We'll leave it fuller than when we started," he said, according to OilPrice.com. But buying aggressively at current prices near $100 per barrel forces the government to take public losses on barrels sold near $75 during the Biden era. And the 36 million barrels the administration has pledged to add back do not simply appear because a target gets announced.

Can Alternative Suppliers Fill the Gap?

Norway is trying. The country's offshore oil production hit 2.158 million barrels per day in April—6.7 percent above official forecasts and 129,000 barrels per day higher than April 2025, the Norwegian Offshore Directorate reported. Crude oil output alone reached 1.94 million barrels per day, exceeding the forecast of 1.81 million barrels per day. Europe's largest supplier of natural gas is pumping harder as the continent grows increasingly dependent on stable North Sea energy in a fragile global market.

But Norway's extra 129,000 barrels per day barely registers against the scale of the disruption. The Strait of Hormuz normally handles about 20 million barrels per day. Even with some tankers now exiting—Reuters reported that six tankers carrying 6 million barrels of crude successfully left the strait on May 20, some by switching off their transponders to avoid detection—the flow remains a fraction of normal levels. Bloomberg data showed four supertankers hauling 2 million barrels each exited since May 10, a rate close to 2 million barrels per day. Prior to the war, about 20 tankers of various sizes crossed the waterway daily.

The cumulative losses in crude oil supply have topped 1 billion barrels since early March, according to OilPrice.com—enough to run Japan for six months. Standard Chartered warned that the rapid SPR drawdowns and other emergency measures are only temporary fixes, with physical oil market tightness likely to return once reserve releases end.

Who Benefits From $100 Oil?

Russia does. The country's state oil and gas revenues are expected to increase 39 percent year-on-year to 700 billion rubles ($9.8 billion) in May, driven by higher global oil prices caused by the Iran war, Reuters reported. Russian producers paid 707.1 billion rubles in federal oil taxes in April—the highest since October, according to Bloomberg calculations based on Finance Ministry data. The price of Russian Urals crude currently stands around $115 per barrel, up from $57 on February 27, the day before the U.S. and Israel launched their bombardment of Iran, CNBC reported in March.

Moscow is one of the main beneficiaries of a crisis affecting its Middle East partner. The windfall helps President Vladimir Putin postpone planned cuts to state spending that would have proved unpopular, analysts told CNBC. Russia's oil export revenues surged by roughly $9.3 billion month-on-month to $19 billion in March, according to the Kyiv School of Economics. India's average daily imports of Russian oil jumped 82 percent in the first three weeks of March compared to February's average, following a U.S. waiver allowing countries to buy Russian crude stranded at sea.

The irony is sharp. Western sanctions aimed at starving Moscow of energy revenues are being temporarily relaxed to cope with the very crisis that is enriching Russia. The U.S. extended a 30-day waiver on Russian oil purchases multiple times. Now the UK has followed suit.

When Sanctions Meet Reality

Britain eased sanctions on Russian oil this week, issuing a trade license that permits imports of jet fuel and diesel refined from Russian crude in third countries such as India and Turkey. The license, which came into effect May 20, is of "indefinite duration" and will be periodically reviewed, according to the UK Department for Business and Trade. The Financial Times first reported the move, which the government framed as a temporary measure to protect British consumers amid soaring fuel prices.

Prime Minister Keir Starmer insisted the government is not lifting sanctions "in any way whatsoever," but rather phasing in a sanctions package announced in October. The distinction did not satisfy critics. "After 18 months of 'standing up to Putin' the Labour govt quietly issued a licence allowing imports of Russian oil refined in third countries," Conservative leader Kemi Badenoch wrote on X. Emily Thornberry, who chairs Parliament's Foreign Affairs Committee, told BBC Radio 4 that Ukrainians would "feel very let down" by the move.

The UK is hardly alone. The policy exposes a familiar sanctions problem: once Russian crude is processed in another country, enforcement becomes more complex. Countries like India and Turkey have played an important role in refining Russian crude and selling processed products into global markets. Those products may no longer be legally classified the same way as crude imported directly from Russia, but their origin still raises questions about the effectiveness of Western restrictions.

Gasoline prices in the UK hit 158.5 pence per liter on May 20—the most expensive since December 2022, the RAC reported. In the United States, the national average stood at $4.56 per gallon on May 20, up more than $1.40 from last year and more than 50 percent since late February, according to AAA. GasBuddy forecasts U.S. prices will average $4.80 per gallon between Memorial Day weekend and Labor Day. If the Strait of Hormuz remains closed late into the summer, prices could test the all-time high of $5.02 per gallon, GasBuddy's Patrick De Haan told CBS News.

What Changed This Week

The Strategic Petroleum Reserve crossed a symbolic threshold, falling below 375 million barrels for the first time since the current crisis began. Norway's April production data confirmed that non-OPEC producers are pumping at maximum capacity but cannot offset Middle East losses. Britain became the latest Western government to choose energy security over sanctions purity, joining the U.S. in easing restrictions on Russian oil products. And tanker flows through Hormuz remain sporadic—enough to prevent total collapse, not enough to restore normal supply.

What to Watch

The next EIA Weekly Petroleum Status Report, due May 22, will show whether SPR drawdowns continue at record pace. If they do, the reserve could drop below 365 million barrels within a month. GasBuddy's summer forecast suggests gasoline prices will peak in late June or early July, depending on Hormuz developments. Watch for any announcement from the IEA on extending or expanding the 400-million-barrel coordinated release—current commitments run through mid-June. And monitor whether other European governments follow Britain's lead on Russian refined products. The sanctions coalition held firm for two years. The Iran crisis is testing how long energy security and geopolitical resolve can coexist at $100 oil.