U.S. strategic oil reserves have fallen to their lowest level in over four decades as the ongoing conflict in Iran disrupts global oil supplies and drives up fuel costs.
Gas prices nationwide average $4.04 per gallon—up from $3.88 a month prior and nearly $3 before the war began on February 28, according to AAA data. California remains the most expensive state at $5.58 per gallon, followed by Hawaii ($5.54) and Washington ($5.15), while Indiana has the lowest at $3.52.
Oil prices have also climbed, with Brent crude futures rising 1.24% to $90 per barrel and U.S. West Texas Intermediate crude increasing 1.3% to $84.3 per barrel amid heightened concerns over shipping route security.
Strategic Petroleum Reserves (SPR) Depletion
The U.S. Strategic Petroleum Reserve (SPR) has dropped to 298.7 million barrels, the lowest level since January 1983, according to the Department of Energy. The reserve has been drawn down by 172 million barrels since March as part of a coordinated release with the International Energy Agency (IEA) to stabilize markets following joint U.S.-Israel strikes on Iran.
The SPR’s maximum authorized capacity is 727 million barrels, and refilling it will require significant time given current supply constraints. The IEA requires member countries, including Canada, to maintain emergency reserves equal to 90 days of net crude oil and petroleum product imports.
Shipping Route Disruptions and Market Reactions
Attacks on vessels in the Red Sea and Gulf of Oman have intensified concerns over global oil supply chains. On Tuesday, Iran-backed Houthi rebels killed six people in an attack on a cargo ship in the Bab el-Mandeb Strait, marking the first reported fatalities from such incidents in over a year. Hours later, U.S. forces fired missiles at a container ship allegedly attempting to breach Washington’s blockade of Iranian ports in the Gulf of Oman.
The Strait of Hormuz, a critical shipping channel through which one-fifth of the world’s oil supply typically passes, remains severely restricted. Iran has declared the waterway closed, warning that any cargo vessels entering could face consequences.
Regional Price Variations and Tax Factors
Gas prices vary significantly by state due to a combination of supply disruptions, regional refinery capacity, and tax structures. California’s high prices are influenced by its reliance on Middle Eastern oil imports, recent refinery closures, and the highest combined state and excise fuel taxes in the nation. In contrast, states like Indiana and Texas, which have lower taxes and greater domestic production, report the lowest prices.
Market Sentiment and Diplomatic Uncertainty
Energy analysts and markets are increasingly skeptical about the prospects of a near-term agreement to reopen the Strait of Hormuz. Dan McTeague, president of Canadians for Affordable Energy, described the situation as “worse than 2008”, citing extreme volatility and the potential for further price hikes. He noted that energy markets are beginning to “lose hope” that a U.S.-Iran deal will materialize soon.
José Torres, Senior Economist at Interactive Brokers, emphasized that while diplomatic progress has been signaled, “tangible progress is likely required for yields to fall significantly and stocks to rally further.” He added that slightly rising oil prices reflect persistent supply concerns tied to the conflict.
Long-Term Implications for Energy Security
The depletion of the U.S. SPR and ongoing disruptions in key shipping routes raise questions about long-term energy security. The IEA’s coordinated release of 400 million barrels was intended as a temporary measure, but experts warn that replenishing reserves will be a lengthy process given strained global supplies. Canada, a net oil exporter and IEA member, does not maintain a government-mandated strategic stockpile, relying instead on market mechanisms to manage supply shocks.
The conflict’s impact extends beyond fuel prices, affecting inflation, transportation costs, and broader economic stability. Policymakers and industry leaders continue to monitor developments in the Middle East, where the closure of the Strait of Hormuz and ongoing attacks on shipping lanes remain unresolved.