Driving Discussions: Summer 2026 Outlook - War Driven Tightness in U.S. Gasoline Markets

The February onset of the U.S.–Iran conflict initially left the U.S. gasoline market well‑stocked, with inventories 4 % above the five‑year average. However, within weeks crude price spikes lifted Gulf Coast and New York Harbor benchmarks by 37‑50 cents per gallon, signaling the first market reaction. By late May, cumulative war‑driven exports had drained stocks to the lowest May levels since 2014, a 16 % decline from the war’s start—double the typical seasonal drawdown. This rapid tightening reshapes the supply outlook just as the summer driving season approaches.

Export dynamics shifted dramatically, with Gulf Coast cargoes rising 32 % above the five‑year average and heading to Mexico, Latin America, Africa, and Asia. Meanwhile, imports to the Atlantic and West Coasts fell, creating early‑spring imbalances that later eased when New York Harbor arrivals more than doubled in May, though still shy of normal seasonal volumes. The March 17 Jones Act waiver allowed foreign‑flag vessels to move fuel between U.S. ports, prompting a noticeable reroute of barrels directly to the West Coast while northern East Coast markets remained dependent on the Colonial Pipeline. These regional flows have softened the expected summer shortage.

EPA emergency fuel waivers aimed at easing price pressure succeeded in flattening reformulated gasoline and CBOB spreads in markets such as Chicago and Texas, but New York’s strict 7.4 RVP specification kept spreads widening despite higher‑RVP Buckeye deliveries. Traders continue to blend to the lower spec to meet barge and NYMEX delivery requirements, turning Arbob into a blend stock and altering summer economics. The unexpected oversupply in the Northeast highlights how policy levers, export surges, and seasonal turnover intersect to reshape price dynamics. Stakeholders should monitor inventory trends, waiver expirations, and pipeline flows as the peak driving months unfold.