Diesel Cracks Plunge on U.S. Export Ban Report

  • U.S. diesel cracks fell $12.70 to $97.85/bbl after Politico reported the White House is preparing a 90-day diesel export ban.
  • Gasoline cracks jumped $2 to $47.41/bbl on concerns that lower diesel margins could force refiners to cut production, tightening gasoline supply.
  • The proposed ban is not yet in force, but President Trump supports the concept and the administration is assessing its feasibility.

Market Reaction

U.S. diesel crack spreads plummeted on Tuesday following a Politico report that the White House is preparing a 90-day ban on diesel exports. The move reflects market fears that a ban would trap diesel supply domestically, depressing prices, while disrupting global flows. Gasoline cracks, by contrast, rose $2 to $47.41/bbl as traders bet that refiners, facing lower diesel margins, would reduce crude runs—curbing gasoline output as well. European gasoil cracks also climbed as markets priced in reduced U.S. diesel exports.

The proposed ban is not yet in force, and official signals remain mixed. President Trump voiced support for the measure on September 22 amid record U.S. diesel prices, with AAA’s national average at about $6.51 per gallon, according to Reuters (TRI). Treasury Secretary Scott Bessent said the administration is evaluating whether a full or partial restriction is feasible. A day earlier, the White House said it was not considering such restrictions. Markets are thus pricing a meaningful policy risk rather than a done deal.

Background and Context

The turmoil comes amid a global diesel shortage. Diesel/gasoil accounts for nearly 30% of global oil demand, and the IEA reported that U.S. diesel prices exceeded $200 per barrel in early September, about 94% above pre-war levels. Supply from the Gulf has been heavily disrupted: net diesel exports from Gulf countries averaged just 390,000 barrels per day in August, a quarter of pre-war levels, as trade through the Strait of Hormuz remained constrained. Combined Gulf and Russian diesel exports were 1.6 million barrels per day below February levels.

The U.S. has stepped in as a supplier of last resort, exporting a record 1.6 million barrels per day of diesel in August, up from roughly 1 million b/d in February. Major customers include Brazil, Chile, Mexico, Peru, Morocco, France, and the UK. Europe is particularly exposed: the U.S. supplied roughly half of Europe’s seaborne diesel imports in August, according to Vortexa data cited by the IRU. EU weighted-average diesel prices reached €2.26 per litre on September 17, up 38% from February 27.

Industry Pushback

The American Petroleum Institute argues that blocking diesel exports would cause Gulf Coast inventories to build, force refinery run cuts, and reduce supplies of gasoline, jet fuel, and diesel simultaneously. “Diesel cannot be separated cleanly from the rest of a refinery’s output slate,” an industry analyst noted. Supporters counter that retaining export volumes at home could quickly expand local availability during a period of record retail prices—a politically compelling argument ahead of elections, especially in agricultural and freight-intensive states.

A restriction would mark a major departure from the U.S. role as a large exporter of refined fuels. Refined products have generally been freely exportable, unlike crude oil under the old export-control regime that lasted from 1975 to 2015. Reuters reports that the president could impose temporary restrictions using emergency powers, though the administration is still weighing whether a full ban, partial restriction, or another mechanism would work operationally. The move could also face legal challenges, as international trade rules generally bar quantitative export restrictions, though GATT contains an exception for temporary measures addressing critical shortages.

Outlook

Short term, expect extreme volatility in diesel and gasoline cracks, Gulf Coast product differentials, and freight markets until the White House clarifies its stance. A full ban would likely depress U.S. diesel values relative to global benchmarks while lifting European and Latin American prices. Refining equities could react differently depending on each company’s exposure to diesel exports versus domestic retail and refining margins. If enacted, the initial domestic effect would likely be lower wholesale diesel prices in export-heavy regions. But analysts warn that the benefit could erode if refineries cut runs because they cannot economically clear surplus diesel, which would reduce gasoline and jet-fuel production as well.

Longer term, a ban could undermine the U.S. role as a reliable refined-product supplier, prompt importers to secure alternative supply or build strategic stocks, and encourage governments to use trade restrictions more often during fuel shortages. It would not resolve the core issue: global diesel supply remains constrained by reduced Middle Eastern export availability, disruptions involving Russia, and stressed refining capacity.

Key near-term indicators include a formal White House decision, whether any measure is a full ban, partial quota, licensing regime, or geographic exemption, refinery run-rate guidance, Gulf Coast inventory changes, and shifts in flows to Europe, Mexico, and Latin America.

Correction: An earlier version of this article misstated the date of President Trump’s support for the ban. It was September 22, not September 21.