This price and market structure story centers on a looming Canadian crude squeeze just as U.S. refiners need more supply. Canada sends more than 4 million barrels a day of crude to the United States, while American plants are processing the most oil in eight years to capture record diesel margins.
Rystad Energy expects planned oil sands maintenance to remove about 300,000 barrels a day of production next month. Suncor Energy and Canadian Natural Resources plan equipment shutdowns, including work at the Syncrude upgrader that was postponed earlier this year.
Refineries in the U.S. Midwest are especially exposed because Canadian crude supplies about 70 percent of their intake. Inventories at Hardisty, Alberta, are near their lowest level since March 2025, while Canadian imports into the United States posted their largest weekly decline since May.
The tight balance is already visible in prices and pipelines. The premium for synthetic crude, a diesel rich oil sands grade, rose to almost $20 a barrel over U.S. futures last week, while Enbridge and Trans Mountain stopped rationing pipeline space as maintenance reduced shipment volumes.