NEW YORK / RankWire.AI / – The persistent rise in diesel prices across the United States and Europe results from limited inventories and disruptions in refinery operations. U.S. ultra-low sulfur diesel futures increased by 7.4% on Monday, reaching $4.19 a gallon, marking the largest single-day rise since July 13. Early Wednesday, the contract traded close to $4.28 a gallon. Meanwhile, European diesel refining margins maintained historically high levels, having gained nearly 10% at the start of the week.
Diesel stockpiles in the U.S. have dwindled to levels rarely seen during the summer season. According to the U.S. Energy Information Administration, distillate stocks totaled 107.2 million barrels for the week ending July 31, a decline 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 corresponding level in 2024. Since distillates include diesel and heating oil, this data point is a key indicator of fuel supply conditions.
Retail diesel prices also remain significantly above earlier summer levels. The national average hit $5.257 per gallon on August 10, slightly below the $5.348 recorded a week prior. In July, prices averaged $4.578 per gallon on the 6th. Europe faces similar pressure, with the premium for low-sulfur gasoil over crude reaching an all-time high of $74.66 per barrel on July 30, underscoring the premium placed on finished diesel supplies amid tight market conditions.
Refinery outages intensify fuel supply pressures
The global fuel market faces further tightening due to several major refinery outages. A facility in Russia’s Tatarstan region was damaged by an attack, adding to the reduction in Russian processing capacity. Saudi Arabia’s Jazan refinery has remained offline since July 27 following an earlier attack, removing another source of refined products from international trade. During June, global refinery utilization was already below the levels seen a year earlier, with multiple regions reporting decreased processing volumes.
Export restrictions have further contributed to supply constraints. Russia extended its limits on gasoline and diesel exports through January 31, 2027. In addition, vessel traffic through the Strait of Hormuz from the Middle East has decreased. China’s domestic refinery activity has also weakened, reducing its contribution to global markets. 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.
Stock levels remain low, keeping diesel markets under pressure
Despite processing high volumes of crude, U.S. refineries have not replenished distillate inventories to normal seasonal levels. Crude input during the first seven months of 2026 hit its highest point since 2019 for that period. However, refinery utilization remains elevated without restoring stocks to typical levels for this time of year, which are now at their lowest in nearly three decades. This situation leaves the U.S. fuel market vulnerable to shifts in refinery output and international product flows.
Crude oil prices also increased on Wednesday, with Brent near $89.81 a barrel and West Texas Intermediate around $84.08. The upward pressure on diesel prices persists because supplies of finished products remain limited across key markets. Diesel supports a range of sectors including trucking, agriculture, construction, and manufacturing. The combination of low U.S. inventories, high European refining margins, refinery outages, and export restrictions continues to keep diesel markets tight on both sides of the Atlantic.