• The White House is exploring measures to lower record-high diesel prices, including a potential 90-day export ban and pressure on Europe to release strategic reserves.
  • Diesel averaged $6.382 per gallon last week—down 14.7 cents but still $2.63 above a year ago—with West Coast prices at $7.357.
  • Refiners and some officials warn an export ban could backfire, raising gasoline and jet fuel costs and tightening global supplies.

No Final Decision as Options Dwindle

President Trump has asked the Treasury Department to identify ways to reduce diesel prices, according to people familiar with the matter, as the administration scrambles to address a fuel crunch that is feeding into inflation ahead of the November midterm elections. The request, first reported by Politico, follows weeks of internal debate over whether to restrict U.S. diesel exports—a move that has split the administration and drawn fierce opposition from refinery executives.

On September 30, Trump said he had not decided on an export ban and openly acknowledged the central tradeoff: diesel prices might fall somewhat, but gasoline prices could rise. Energy Secretary Chris Wright, meanwhile, said the administration expects measures from Europe that would add diesel supply and “meaningfully” lower prices. The White House has not announced a final policy.

A Ban on the Table, but Resistance Mounts

The proposal under consideration would temporarily restrict diesel exports, potentially for 90 days, according to the underlying Politico reporting. But the idea has run into significant resistance from refinery executives and some administration officials, who argue it could distort refining economics and raise prices for gasoline and jet fuel. A refinery cannot simply make diesel alone; changing diesel economics affects the production of other petroleum products.

Instead, the administration has circulated a plan asking EU governments to release an estimated 120 million barrels of diesel from national strategic inventories over 180 days—presented as an alternative to cutting U.S. exports. That request shifts political and supply burdens to Europe, which is still grappling with energy security risks from the Russia-Ukraine war.

Why Diesel Is So Expensive

The immediate market stress stems from disrupted global refined-product supplies. Conflict involving Iran has constrained energy flows through the Strait of Hormuz, while Russia’s war against Ukraine has also reduced or reshaped diesel availability. U.S. inventories have been unusually tight: reporting cited U.S. diesel stocks at 107.9 million barrels as of September 11, a record low in that series.

Refining disruptions have compounded the shortage. Reports point to a shutdown at an ExxonMobil (XOM) refinery in Illinois and an extended labor dispute at a BP (BP) refinery in Indiana, adding localized supply pressure at a sensitive time for the Midwest harvest.

Diesel is a core input for trucking, farm machinery, construction equipment, rail, shipping, backup generation, and freight distribution. High diesel prices therefore pass through into food, consumer goods, and construction costs rather than affecting only motorists. The U.S. national on-highway diesel average was $6.382 per gallon for the week of September 28, down 14.7 cents from the prior week but still $2.63 above a year earlier. Regional prices remained highest on the West Coast, at $7.357 per gallon.

Refiners and Exporters in the Crosshairs

There is no single company at the center of the headline; it concerns U.S. fuel policy and the broader refining/export system. However, large refiners and exporters—such as Valero (VLO), Marathon Petroleum (MPC), and Phillips 66 (PSX)—would be materially exposed to any export restriction because their margins and refinery operations rely in part on access to overseas markets. Most refiners oppose an export ban because exports help balance product slates and sustain refinery utilization.

Analysts cited in reporting warned that a U.S. export ban could tighten the world market and become self-defeating if refiners respond by reducing output. Europe, Canada, Mexico, and other import-dependent markets rely on U.S. diesel exports; an export prohibition could push their prices higher while creating uncertainty for global fuel trade.

Political Fallout and Next Steps

Politically, fuel affordability is highly salient ahead of the November midterm elections. Diesel’s effects are especially visible to farmers, truckers, small businesses, and households facing higher food and delivery costs. Truckers and logistics firms say higher diesel directly reduces margins or prompts freight surcharges. Farmers face autumn harvest season with diesel use for tractors, grain handling, and trucking—recent reporting described Midwest pump prices more than $3 per gallon above year-earlier levels in several states.

The latest price spike eclipsed the previous U.S. national diesel record of about $5.81 per gallon, set in June 2022; the September 2026 peak reached $6.529 per gallon. Like the 2022 episode, the current situation combines geopolitical disruption with constrained refining and distribution capacity. The difference is the wider, simultaneous stress on Middle Eastern shipping routes, Russian supply, and U.S. refinery availability.

A coordinated release of emergency stocks, combined with increased flows through the Strait of Hormuz, could moderate prices within weeks. One analysis cited by Time estimated that a prompt diesel release might lower U.S. prices by as much as roughly 25 cents per gallon after several weeks, though the result depends on the scale and speed of actual deliveries. The administration may retain the export-ban threat as leverage while it negotiates reserve releases and monitors domestic prices.

The key next data point is the weekly EIA diesel-price update scheduled for October 6, along with any formal administration announcement on reserve releases, export policy, or refinery-supply measures. Spokespeople for the Treasury and Energy departments did not immediately respond to requests for comment.