Trump’s Diesel Export Plan Faces a Refinery Problem

President Donald Trump said on September 22 that he had urged his administration to consider keeping more US diesel at home. The next day, the US Chamber of Commerce, Business Roundtable, National Association of Manufacturers, American Petroleum Institute and dozens of allied groups sent a letter warning that restricting exports would produce “less fuel production, tighter supplies and rising costs.”

The proposal has an easy political logic. US diesel averaged $6.51 a gallon on September 24, according to AAA data cited by CNBC, $2.82 more than a year earlier. Iowa Senator Chuck Grassley has called for an export embargo as farmers and truckers absorb record fuel costs ahead of the November midterm elections.

American refineries make more diesel than the domestic market consumes, so directing more of it toward US buyers could produce an initial discount. A report that officials were considering a 90-day ban sent diesel futures and refinery shares lower. Treasury Secretary Scott Bessent confirmed that the administration was studying whether a full or partial restriction was feasible, while Energy Secretary Chris Wright said a complete halt was not under discussion.

That leaves the policy somewhere between presidential preference, feasibility review and bargaining signal. The details would decide who receives cheaper fuel, for how long and at whose expense.

Cheap Diesel Now, Less Fuel Later

Diesel emerges from the same refining process that produces gasoline, jet fuel, heating oil and other petroleum products. A refinery cannot turn down one product as though it were closing a tap above a separate sink. The mix can be adjusted, but only within physical and commercial limits.

Andy Lipow, president of Lipow Oil Associates, described the commercial problem to Yahoo Finance: refiners would have less reason to produce surplus distillate if they could no longer sell it abroad. Processing less crude would also reduce gasoline, jet fuel, lubricants and asphalt output, potentially creating shortages and higher pump prices in those markets.

The dispute therefore runs on two clocks. During the first period, an export restriction traps more diesel in parts of the United States and pushes local prices down. During the second, refiners decide whether the lower domestic price still justifies their previous production rate. If they cut runs, the total fuel pool shrinks and some of the initial relief can disappear.

Industry groups have a financial interest in preserving foreign customers, so their letter should be read as lobbying rather than disinterested economic scripture. Their mechanism nevertheless matches the incentives described by refining analysts. It also explains why a brief fall in diesel futures would establish only the immediate effect of a restriction.

GasBuddy petroleum analyst Patrick De Haan offered a second objection. US diesel prices reference a globally traded market, he wrote, so keeping barrels at home would not erase the international price influencing domestic transactions. Economist Joseph Brusuelas told Yahoo Finance that US production of 5.3 million barrels a day exceeded domestic demand of 3.6 million. In his account, an export ban would create a short-term surplus and discount, followed by lower production if suppliers could no longer sell that surplus profitably.

That sequence remains a forecast. Refiners might maintain production during a short restriction, particularly if margins remained strong or officials created exemptions. Inventories, maintenance schedules and the design of a quota would all influence the result. A full prohibition lasting months would create stronger incentives to change output than a brief or partial measure.

A National Ban Would Produce Regional Prices

The phrase “US diesel market” conceals several markets joined imperfectly by pipelines, ships and railways. Gulf Coast refineries can have surplus diesel while New England remains dependent on imported fuel.

FreightWaves energy reporter John Kingston identified the regional fault line. New England has no nearby refineries and relies heavily on Europe, while the Colonial Pipeline carrying fuel from the Gulf Coast to New York Harbor may already lack room for additional volumes. The West Coast is similarly difficult to supply from the Gulf because cargoes may need a long journey through the Panama Canal.

A restriction could consequently flood Gulf Coast spot markets without delivering the same quantity to Boston or Los Angeles. It could also tighten European supply, raising the price of the imports on which New England depends. The barrel kept inside the national border would still be stranded on the wrong side of a domestic bottleneck. Oil markets have a dark sense of geography.

The international exposure is substantial. The United States exports roughly 1.3 million barrels of diesel a day, the BBC reported, with the United Kingdom and Netherlands among the economies using American fuel to replace Russian supplies. The US Energy Information Administration describes distillate, chiefly diesel, as the country’s largest transportation-fuel export by volume. Its 2025 trade data show exports averaging 89,000 barrels a day to the UK and 98,000 to the Netherlands.

Those figures turn an American pump-price intervention into a distributional choice. Some domestic buyers could receive a temporary discount, while importers compete for fewer cargoes. Countries paying for fuel in weaker currencies would face the international price increase plus any exchange-rate depreciation, although the size of that effect would vary by country and cannot be inferred from US export volumes alone.

Britain illustrates the condition of an import-dependent market, rather than providing a clean experiment in export controls. The RAC put the UK average diesel price at 198.32 pence a litre on September 25, the highest in Europe by 12 pence. BBC Scotland found more than 200 filling stations charging above £2 a litre, while the Road Haulage Association estimated that fuel was costing operators roughly £250 extra per vehicle each week.

War, damaged refineries and constrained shipping have driven those British prices. A US restriction has not caused them. The comparison shows where the next supply loss would land: on hauliers, farmers and households already paying for a global refining shortage.

The 1970s Precedent Has Limits

US energy law carries the institutional memory of the 1973 oil crisis. Congress enacted the Energy Policy and Conservation Act in 1975, establishing the Strategic Petroleum Reserve and giving the executive branch powers to respond to energy disruptions, including authority to restrict exports of petroleum products and grant exceptions.

A federal crude-oil export ban operated from 1977 until 2015, with exemptions for some shipments. A historical summary of the statute records the boundary relevant today: crude generally required an export licence, while processed oil could be exported without one.

The old crude ban and the current diesel proposal share an institutional ancestry and a political instinct, reserving domestic energy for domestic users during a supply shock. Their market mechanics diverge. Crude is the refinery’s input. Diesel is one of several outputs produced during the same run. Restricting diesel sales can therefore alter production of fuels that the restriction does not cover.

The economic setting has also changed. The 1970s framework emerged after an embargo exposed US dependence on imported oil. The United States now serves as a major supplier of refined fuel to countries whose transport and agricultural systems depend on those cargoes. Reusing the legal authority would not recreate the market in which Congress wrote it.

Watch the Refinery Gate

The first movement in the pump price would give an incomplete verdict. A domestic diesel decline accompanied by stable refinery runs would support the argument that restrictions redirected supply without discouraging production. Falling refinery runs, tighter gasoline or jet-fuel markets and widening price differences between US regions would support the business groups’ warning.

Duration and exemptions belong on the same dashboard. Refiners may tolerate a short disruption without altering operations. A longer restriction gives them more reason to adjust crude purchases, maintenance and output, while importing governments gain time to seek replacement cargoes or protect their own markets.

Trump’s proposal offers visible relief by keeping barrels inside a border. Whether those barrels reach the farmers and truckers promised relief depends on refinery incentives, pipelines and ports. If Washington proceeds, the first fall in diesel prices will be the opening result, not the final verdict.