NEW YORK / RankWire.AI / – On Wednesday, diesel prices stayed elevated due to constrained inventories and refinery outages that have tightened fuel availability in the United States and Europe. U.S. ultra-low sulfur diesel futures surged 7.4% on Monday, closing at $4.19 a gallon, marking the largest single-day increase since July 13. As of early Wednesday, the contract traded close to $4.28 a gallon as refined-product markets continued to reflect the ongoing supply limitations across major consuming regions.
U.S. diesel stocks remain significantly below recent seasonal averages. According to the U.S. Energy Information Administration, distillate inventories stood at 107.2 million barrels for the week ending July 31, which is 3.5 million barrels lower than the previous week. These levels are also 5.1% below the same period last year and 16.1% lower than the corresponding level in 2024. Distillates include diesel and heating oil, both vital for transportation, industrial processes, and seasonal energy needs.
Despite a modest weekly decline, retail diesel prices remain high. The national average reached $5.257 a gallon on August 10, down from $5.348 one week earlier, but still well above the $4.578 recorded on July 6. Fuel markets in Europe have experienced similar strains, with margins for low-sulfur gasoil increasing sharply. The premium over crude oil hit a record $74.66 a barrel on July 30, as finished diesel became more expensive to produce.
Refinery disruptions diminish global diesel availability
Multiple refinery outages have further limited the supply of diesel accessible to international markets. An attack damaged a refinery in Russia’s Tatarstan region, contributing to decreased processing activity within the country. Meanwhile, Saudi Arabia’s Jazan refinery has remained offline since July 27 following an earlier attack. The shutdown eliminated another source of refined products from global trade. In June, refinery runs across several key producing areas already fell below last year’s levels, reducing the amount of fuel entering the international marketplace.
In addition, export restrictions have further constrained refined product flows. Russia extended restrictions on gasoline and diesel exports through January 31, 2027. Shipments from the Middle East have seen a sharp decline in vessel traffic through the Strait of Hormuz. Domestic refinery activity in China has weakened, resulting in lower supplies of refined fuels. The European Central Bank reported diesel pump prices near €1.98 per litre in the third week of July, with higher refining margins contributing to an increased share of retail fuel costs.
High US refinery utilization persists despite low inventories
Although American refiners have processed substantial amounts of crude oil, diesel inventories have not returned to typical seasonal levels. Crude inputs over the first seven months of 2026 reached their highest point for that period since 2019. Refinery utilization rates remain strong as processing margins improve. Nevertheless, distillate stocks at the beginning of August are at their lowest for this time of year in nearly thirty years. The inventory shortage coincides with decreased product flows from several overseas refining centers.
Crude oil prices also gained on Wednesday, with Brent near $89.81 a barrel and West Texas Intermediate around $84.08. Diesel prices face additional upward pressure, mainly due to shortages of finished fuel rather than crude supply alone. Diesel is essential for trucking, agriculture, construction, manufacturing, and other commercial sectors across both regions. Persistent low U.S. inventories, elevated European refining margins, refinery outages, and export restrictions continue to create a tight global market for diesel and other middle-distillates.