NEW YORK / RankWire.AI / – On Wednesday, diesel markets experienced continued pressure due to dwindling inventories and refinery outages, which have restricted fuel availability across the United States and Europe. U.S. ultra-low sulfur diesel futures surged by 7.4% on Monday, reaching $4.19 a gallon. This marked the strongest daily rise for the contract since July 13. Early Wednesday, prices hovered around $4.28. Meanwhile, European diesel refining margins stayed high after gaining nearly 10% at the beginning of the week.
According to the latest official weekly data, U.S. distillate inventories declined sharply. The U.S. Energy Information Administration reported stocks of 107.2 million barrels for the week ending July 31. This was a decrease of 3.5 million barrels from the previous week. Current inventories are 5.1% below levels from the same period last year and 16.1% below the same period in 2024. The category includes diesel and heating oil, serving as a key indicator of available middle-distillate supply in the domestic fuel market.
Retail diesel prices stayed elevated despite a slight decline from the previous week. As of August 10, the national average was $5.257 a gallon, down from $5.348 a week earlier. Nonetheless, it remains substantially higher than the $4.578 average recorded on July 6. European markets are experiencing similar challenges. The premium for low-sulfur gasoil over crude reached a record $74.66 a barrel on July 30, reflecting the significant increase in diesel’s value compared to crude oil.
Refinery outages restrict global product flow and tighten supplies
Refinery shutdowns have led to reduced availability of diesel and other fuels for international markets. An attack damaged a refinery in Russia’s Tatarstan region, contributing to lower Russian processing activity. Additionally, Saudi Arabia’s Jazan refinery has remained offline since July 27 after an earlier attack. These closures have taken more refined product capacity off the market. Globally, refinery runs were already below year-earlier levels in June, due to decreased processing in key fuel-producing regions.
Export restrictions have further constrained supply. Russia extended curbs on gasoline and diesel exports through January 31, 2027. Shipments from the Middle East faced reduced vessel traffic through the Strait of Hormuz, a vital route for oil trade. China also reduced its refined product exports as domestic refinery activity weakened. The European Central Bank reported diesel pump prices near €1.98 per litre during the third week of July, with refining margins comprising a much larger share of retail costs.
Despite high refinery output, US diesel inventories remain critically low
U.S. refiners have processed record amounts of crude oil, yet distillate stocks remain unusually depleted. Crude inputs in the first seven months of 2026 reached their highest level since 2019 for that period. Despite high refinery utilization, diesel stocks have not returned to typical seasonal levels. As August began, inventories were at their lowest point for this time of year in nearly thirty years. This tight supply situation coincides with decreased international product flows and ongoing refinery disruptions.
Oil prices also climbed on Wednesday, with Brent approaching $89.81 a barrel and West Texas Intermediate at approximately $84.08. The pressure on diesel markets remains intense because supplies of finished fuel are constrained in several major regions. Diesel is essential for trucking, agriculture, construction, and manufacturing sectors. Limited U.S. inventories, elevated European refining margins, refinery outages, and export restrictions have collectively kept diesel markets tight across both regions as buyers compete for scarce refined supplies.