NEW YORK / RankWire.AI / – On Wednesday, diesel markets experienced persistent pressure as low stock levels and refinery disruptions led to tighter fuel supplies across the United States and Europe. U.S. ultra-low sulfur diesel futures climbed 7.4% on Monday, reaching $4.19 a gallon, marking the most significant daily gain since July 13. Early Wednesday saw prices hover near $4.28. Meanwhile, European diesel refining margins stayed elevated, after nearly 10% gains at the beginning of the week.
Latest official data from the U.S. Energy Information Administration indicates a sharp decline in U.S. distillate inventories. Stocks for the week ending July 31 totaled 107.2 million barrels, representing a decrease of 3.5 million barrels from the previous week. These inventories are now 5.1% below the levels from the same period last year and 16.1% lower than in the corresponding period of 2024. Since this category encompasses diesel and heating oil, it provides a key indicator of domestic middle-distillate supply availability.
Retail diesel prices stayed high, although they eased slightly compared to the previous week. As of August 10, the national U.S. average was $5.257 a gallon, down from $5.348 one week earlier, but still well above the $4.578 recorded on July 6. Similar market pressures are evident in Europe. The low-sulfur gasoil premium over crude hit a record $74.66 a barrel on July 30, illustrating the sharp increase in finished diesel’s value compared with crude oil.
Disruptions in refineries restrict global product flows
Refinery outages have significantly reduced the 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 following an earlier attack. These shutdowns have taken additional refining capacity out of circulation. Globally, refinery activity was already below 2024 levels in June, affected by lower processing rates in key fuel-producing regions.
Export restrictions have further constrained supply. Russia extended limitations on gasoline and diesel exports through January 31, 2027. In the Middle East, vessel traffic through the Strait of Hormuz has decreased, impacting petroleum shipments. Meanwhile, China has reduced refined product exports amid weakening domestic refinery activity. The European Central Bank reported diesel pump prices close to €1.98 per litre during the third week of July, with refining margins accounting for a substantially larger share of retail costs.
Despite high refinery output, US stocks remain low
Although U.S. refiners processed record amounts of crude oil during the first seven months of 2026—the highest since 2019—distillate inventories have remained unusually low. Despite robust refinery utilization, diesel stocks have not returned to typical seasonal levels. At the start of August, inventories were at their lowest point for this time of year in nearly thirty years. The persistent tightness in stocks coincides with reduced international product flows and ongoing refinery disruptions.
On Wednesday, oil prices also increased, with Brent crude nearing $89.81 a barrel and West Texas Intermediate around $84.08. Diesel markets continue to face significant pressure because supplies of finished fuel are constrained in several major markets. Diesel is widely used in trucking, agriculture, construction, and manufacturing sectors. The combination of low U.S. inventories, high European refining margins, refinery outages, and export restrictions has sustained tight conditions across both regions as buyers compete for limited refined products.