NEW YORK / RankWire.AI / – On Wednesday, diesel markets continued to feel the squeeze as limited inventories and refinery outages pushed fuel supplies in the United States and Europe into tighter conditions. U.S. ultra-low sulfur diesel futures experienced a significant rise of 7.4% on Monday, reaching $4.19 a gallon. This marked the strongest single-day increase for the contract since July 13. Early Wednesday saw prices hover near $4.28. Meanwhile, European diesel refining margins stayed elevated, having climbed nearly 10% at the beginning of the week, reflecting ongoing supply tightness in the region.
The latest official weekly data reveal a sharp drop in U.S. distillate stocks. According to the U.S. Energy Information Administration, stocks totaled 107.2 million barrels for the week ending July 31, marking a decline of 3.5 million barrels from the previous week. These inventories were 5.1% below the levels recorded a year earlier and 16.1% beneath the same period in 2024. The category includes diesel and heating oil, making it a crucial indicator of the domestic middle-distillate supply available in the fuel market.
Despite some easing, retail diesel prices remained high. As of August 10, the average U.S. retail price was $5.257 per gallon, down from $5.348 one week prior, yet still well above the $4.578 average noted on July 6. European markets are experiencing similar supply pressures, with the premium for low-sulfur gasoil over crude reaching a record $74.66 per barrel on July 30, highlighting the sharp increase in diesel’s value relative to crude oil.
Refinery disruptions intensify global fuel supply constraints
Operational outages at refineries have further diminished the volume of diesel and other fuels available for international trade. Notably, an attack damaged a refinery in Russia’s Tatarstan region, compounded by reduced Russian processing activity. The Jazan refinery in Saudi Arabia has remained shut since July 27 following an earlier attack, removing additional refining capacity from the global market. Already, refinery runs worldwide in June were below last year’s levels, as several major fuel-producing regions experienced lower processing volumes.
Export restrictions have also played a role in limiting supply. Russia extended its restrictions on gasoline and diesel exports through January 31, 2027. Shipping traffic through the Strait of Hormuz, a vital route for petroleum trade, has slowed for Middle East shipments. Additionally, China has cut back on refined product exports amid weakening domestic refinery activity. According to the European Central Bank, diesel pump prices in Europe were near €1.98 per litre during the third week of July, with refining margins constituting a much larger component of retail costs than in previous periods.
Despite high refinery throughput, U.S. diesel stocks remain critically low
Although U.S. refiners have processed record amounts of crude during the first seven months of 2026—reaching their highest levels since 2019—distillate inventories continue to be unusually sparse. The robust utilization of refineries has yet to restore diesel stocks to normal seasonal levels, and inventories at the start of August are at their lowest for this time of year in nearly thirty years. This tight supply situation has coincided with reduced global product flows and ongoing refinery outages, exacerbating the market imbalance.
Meanwhile, oil prices moved higher on Wednesday, with Brent crude approaching $89.81 a barrel and West Texas Intermediate trading around $84.08. Diesel markets are under added pressure because supplies of finished fuel remain constrained in several major markets. This fuel is essential for sectors like trucking, agriculture, construction, and manufacturing. The combination of low U.S. inventories, high European refining margins, refinery shutdowns, and export restrictions has kept diesel supplies tight across regions, with buyers competing fiercely for the limited available product.