Trump Keeps Diesel Export Ban on Table – U.S. Supplies Nearly 80% of Canada’s Imported Refined Petroleum Products

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A U.S. diesel export ban is not in force, but the idea is clearly still alive inside the Trump administration. On September 30, President Donald Trump said discussions about restricting diesel exports were taking place “every day,” even as his own energy secretary has warned that a blanket ban could disrupt refinery operations and eventually push up other fuel prices. For Canada, the concern is complicated. The United States supplied 79.6% of Canada’s imported refined petroleum products in 2025, yet that figure covers far more than diesel. Canada is also a major refiner and diesel producer in its own right. The bigger vulnerability may therefore come from what an American export restriction does to North American refinery economics and an already strained global diesel market rather than simply from Canadian fuel stations losing U.S. diesel shipments.

A Ban Is Still a Possibility, Not an Actual Policy

Trump gave the proposal fresh life on September 30 when he said his administration was discussing a diesel export ban on a daily basis. He acknowledged that restricting exports could have a negative effect on gasoline prices, while arguing that it could help bring down diesel costs. The comments came after U.S. diesel prices had recently reached a record $6.53 per gallon, according to AAA figures cited by Reuters. Trump attributed much of the pressure to disruptions linked to the war in Ukraine, while Reuters also pointed to reduced supplies stemming from the Iran conflict and interruptions at Russian refineries. Those factors have transformed diesel from an ordinary refinery product into one of the most politically sensitive energy commodities in the United States this year.

The administration’s position has nevertheless shifted several times. On September 23, the White House denied a report that it was preparing a flat 90-day export ban. Energy Secretary Chris Wright said at the time that nobody was considering such a blanket prohibition and argued that voluntary measures could be more workable. A week later, however, Reuters reported that the administration was still examining several possibilities, including a blanket ban, voluntary export limits negotiated with refiners and expanded sales of tax-exempt diesel. That makes the current situation less a settled policy than an active debate inside Washington. No final restriction had been announced as of September 30, meaning Canadian businesses are dealing with policy uncertainty rather than an immediate interruption of cross-border fuel flows.

The Nearly 80% Figure Comes With an Important Catch

Canada’s dependence on U.S. refined petroleum imports is substantial when measured across the entire category. Canada imported 485,000 barrels per day of refined petroleum products in 2025, according to the Canada Energy Regulator. Roughly 386,000 barrels per day came from the United States, representing 79.6% of the total. The Netherlands was a distant second at 4.9%, followed by supplies from countries including the United Kingdom, Belgium and Norway. Canada spent approximately $21.4 billion on imported refined petroleum products during the year. On the surface, those numbers make any American fuel-export restriction look potentially severe for the Canadian market.

But refined petroleum products are a broad customs category, and the 79.6% figure should not be interpreted as meaning that four-fifths of Canada’s imported diesel comes from the United States. Gasoline, diesel, jet fuel, heating products, naphtha and other petroleum products can all appear within these flows. Alberta alone imported about 200,000 barrels per day of refined petroleum products in 2025, but the regulator says most of that volume was condensate imported from the United States for blending with oil-sands bitumen. Quebec, Ontario and British Columbia imported more transportation fuels, including gasoline, jet fuel and diesel. The distinction matters because a diesel-specific U.S. restriction would not automatically remove nearly 80% of Canada’s imported refined-product supply.

Canada Is Also a Major Diesel Producer

Canada enters this dispute with significantly more domestic refining capacity than the import statistics alone might suggest. Statistics Canada reported that Canadian refineries produced a record 117.1 million cubic metres of finished petroleum products in 2025. Distillate fuel oil, the category dominated by diesel, accounted for 42.3 million cubic metres, up from 41.6 million in 2024. Canada also recorded a 10.9-million-cubic-metre trade surplus in finished petroleum products during 2025. Compared with 2019, higher distillate fuel exports were one of the factors that strengthened that surplus. In other words, Canada is simultaneously an importer, producer and exporter within the continental petroleum market.

U.S. data reinforce that two-way relationship. The Energy Information Administration says American refineries produced about 1.76 billion barrels of ultra-low-sulfur diesel in 2025 while consuming about 1.42 billion barrels domestically. The United States still imported roughly 60 million barrels of ULSD during the year, and approximately 84% of those imports came from Canada. Separate EIA trade tables show U.S. distillate exports to Canada averaged only about 9,000 barrels per day in 2025 when the regional figures are combined, while considerably larger volumes moved in the opposite direction. None of that means Canada is insulated from a U.S. export restriction, but it does show that the relationship is much more complex than Canada simply buying American diesel.

The Bigger Threat May Be a Global Price Shock

The diesel market was already exceptionally tight before Washington began debating export controls. The International Energy Agency said in its September Oil Market Report that diesel and gasoil represented nearly 30% of global oil demand and that refined-product shortages had become more acute than the broader crude shortage. Net diesel and gasoil exports from the Gulf region and Russia were approximately 1.6 million barrels per day lower in August than they had been in February. Those two regions had accounted for almost 45% of global seaborne diesel trade before the disruptions intensified. Global refinery throughput in August was also 4.2 million barrels per day below the previous year’s level.

Another source of supply disappeared again on September 30 when Russia extended restrictions on diesel exports through the end of October. Russia has traditionally been the world’s second-largest diesel exporter behind the United States, according to Reuters. Meanwhile, the U.S. Energy Information Administration has projected American distillate inventories to remain below the recent five-year range through the end of 2026 and much of 2027. Removing additional U.S. barrels from international trade in that environment could increase competition for diesel produced elsewhere. Canada would still have domestic production, but Canadian refiners and wholesalers operate in markets influenced by international prices, transportation costs and alternative export opportunities. That creates the possibility of higher Canadian wholesale prices even without a severe physical shortage inside the country.

Why an Export Ban Could Eventually Hurt Refinery Output

The central problem for Washington is that refineries do not manufacture diesel in isolation. Processing crude simultaneously produces gasoline, diesel, jet fuel and other petroleum products. Wright has argued that if refiners were prevented from exporting excess diesel, storage tanks could eventually fill. At that point, refiners could be forced to process less crude, which would also reduce the supply of gasoline and jet fuel. He described a blanket export ban as a tool that “definitely doesn’t work” and warned that lower refinery throughput could put upward pressure on other transportation fuels. Trump himself acknowledged on September 30 that a diesel restriction could negatively affect gasoline prices.

Private-sector modelling has produced similarly cautious conclusions. Reuters reported that analysts believed U.S. refiners could reduce crude runs significantly if large diesel volumes became trapped domestically. Wood Mackenzie estimated that roughly 700,000 barrels per day of excess diesel and gasoil could flow into storage under a ban, potentially filling Gulf Coast storage capacity in little more than a month and forcing sizeable refinery cuts. Those estimates are scenarios rather than guaranteed outcomes, but financial markets have already reacted to the possibility. Reuters reported that the discount of U.S. West Texas Intermediate crude to Brent widened as traders considered the prospect of weaker U.S. refinery demand. For Canada, the important point is that a diesel restriction could ultimately alter supplies of several refined products, not diesel alone.

Canada’s Vulnerability Looks Different From Province to Province

Canada has 16 conventional crude oil refineries capable of processing about 1.9 million barrels per day, according to the Canada Energy Regulator. They processed roughly 1.6 million barrels per day in 2025, equivalent to about 90% of available capacity. Western Canada and Quebec/eastern Canada each processed a little more than 600,000 barrels per day, while Ontario averaged roughly 386,000 barrels per day. That domestic network provides substantial protection against an external supply interruption, but it does not leave unlimited spare capacity. During spring refinery maintenance in 2025, nationwide utilization temporarily fell to about 67%, illustrating how quickly scheduled maintenance or an unplanned outage can tighten regional markets.

Import patterns also vary sharply. Alberta recorded about 200,000 barrels per day of refined-product imports in 2025, although much of that was condensate rather than finished transportation fuel. Quebec imported 103,000 barrels per day, Ontario 36,000 and British Columbia 34,000. The CER notes that provinces with tidewater access—including Quebec, Nova Scotia and Newfoundland and Labrador—can source a larger share of petroleum products from European and other overseas suppliers. Geography therefore determines how easily replacement barrels can be found. A terminal in Quebec with access to Atlantic shipping has different options from an inland market linked to U.S. pipelines. Product specifications, freight costs, terminal capacity and available pipelines all limit how quickly supply chains can be rearranged when trade patterns suddenly change.

Diesel Prices Matter Well Beyond Drivers Filling Pickup Trucks

Diesel occupies a large enough place in Canada’s fuel economy that even modest price changes can spread through commercial activity. Statistics Canada reported that end users purchased 29.6 million cubic metres of diesel fuel oil in 2024, representing 33% of all refined petroleum products sold to end users that year. By 2025, national consumption of distillate fuel oil had increased another 2.2%, reaching a new high. Those numbers reflect the fuel’s importance to freight transportation, industrial equipment and other heavy-duty uses rather than simply passenger vehicles.

The practical effects therefore tend to appear throughout supply chains. Freight fleets face higher operating costs when diesel rises, while farms, construction companies, mining operations and businesses using diesel-powered equipment can face similar pressures. The U.S. Energy Information Administration describes diesel as particularly important to trucks, trains, construction machinery and farm equipment because of its energy density and the characteristics of diesel engines. Canadian industries use much of the same equipment. That does not mean every increase at the wholesale level is passed directly into consumer prices, but sustained diesel inflation can increase the cost of moving and producing goods. For households, the consequences may eventually be visible in freight surcharges and business operating costs as much as on fuel-station signs.

What Comes Next

The immediate question is whether the Trump administration moves from discussion to an enforceable restriction. As of September 30, Reuters reported that officials were considering several approaches rather than one finalized plan: a blanket prohibition, voluntary reductions negotiated with refiners and broader access to tax-exempt diesel. Washington has also pushed European governments to release emergency diesel stocks, while officials have looked for additional international supplies. These alternatives matter because voluntary limits or targeted restrictions would produce a very different outcome for Canada than a complete suspension of American diesel exports. Any exemptions for Canada or other integrated North American markets would also materially change the impact, but no such final structure had been announced.

For Canada, the most revealing indicators will extend beyond statements from Washington. U.S. distillate inventories, American refinery utilization, Russian export restrictions, Gulf refining disruptions and the difference between North American and international diesel prices will help determine whether Canadian fuel costs face sustained pressure. Domestic refinery performance will matter just as much. Canada produced record volumes of distillate fuel in 2025 and remains an important supplier to the American market, giving the country more resilience than the headline 79.6% import figure initially suggests. Even so, an increasingly fragmented global fuel market means policy changes in Washington can still travel quickly through prices, trade routes and refinery decisions on both sides of the border.

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