NEW YORK / RankWire.AI / – On Monday, U.S. ultra-low sulfur diesel futures jumped 7.4% to reach $4.19 a gallon, marking the largest single-day increase since July 13. By early Wednesday, the contract hovered around $4.28 a gallon. Meanwhile, European diesel refining margins remained elevated, with gains approaching 10% at the week’s start, reflecting ongoing tightness in supply and refinery issues.
Diesel inventories in the U.S. have dropped to levels rarely seen during the summer months. According to the U.S. Energy Information Administration, the week ending July 31 saw distillate stocks amounting to 107.2 million barrels, a decrease of 3.5 million barrels from the previous week. This figure is 5.1% below the same period last year and 16.1% lower than the comparable level in 2024. Since distillates include diesel and heating oil, these stocks are a crucial indicator of fuel availability.
Retail diesel prices have also remained significantly above earlier summer levels. As of August 10, the U.S. national average stood at $5.257 a gallon, slightly down from $5.348 a week earlier, and considerably higher than the $4.578 per gallon recorded on July 6. Europe faces similar pressure from rising refining costs, with the premium for low-sulfur gasoil over crude hitting a record $74.66 a barrel on July 30, emphasizing the high value placed on finished diesel supplies.
Refinery outages intensify fuel supply concerns
The market’s tightening has been exacerbated by several major refineries operating below normal capacity. A damage incident at a refinery in Russia’s Tatarstan region has further reduced Russian processing activity. Additionally, Saudi Arabia’s Jazan refinery has remained offline since July 27 following an earlier attack, removing another source of refined products from international markets. During June, global refinery runs were already significantly below the levels seen a year earlier, with multiple regions reporting decreased processing volumes.
Export restrictions have added to the supply strain. Russia has extended limits on gasoline and diesel exports until January 31, 2027. Meanwhile, vessel traffic from the Middle East through the Strait of Hormuz has declined. China’s domestic refinery activity has weakened, leading to less refined fuel available for export. In Europe, the European Central Bank reported diesel pump prices near €1.98 per litre during the third week of July, as refining margins surged sharply.
Low stock levels sustain pressure on diesel markets
Despite high crude throughput at U.S. refineries, diesel inventories remain constrained. Crude inputs during the first seven months of 2026 reached their highest point since 2019 for that period. Nevertheless, high refinery utilization has failed to rebuild distillate stocks to typical seasonal levels, which are now at their lowest for this time of year in nearly three decades. This deficit makes the U.S. fuel market vulnerable to fluctuations in refinery output and international product flows.
Crude oil prices rose again on Wednesday, with Brent approaching $89.81 a barrel and West Texas Intermediate around $84.08. The price of diesel has faced greater upward pressure due to persistent supply limitations across several major markets. Diesel is vital for sectors such as trucking, agriculture, construction, manufacturing, and other commercial activities. The combination of low U.S. inventories, high European refining margins, refinery outages, and export restrictions has kept diesel markets tight across both sides of the Atlantic.