NEW YORK / RankWire.AI / – In the United States and Europe, diesel markets faced renewed pressure on Wednesday as inventories remained low and refinery outages disrupted supply chains. U.S. ultra-low sulfur diesel futures surged 7.4% on Monday to reach $4.19 a gallon, marking the largest daily gain since July 13. Early Wednesday trading saw prices near $4.28. Meanwhile, European diesel refining margins stayed elevated after nearly a 10% increase at the start of the week.
Latest official weekly data from the U.S. Energy Information Administration indicated a significant drop in distillate inventories. For the week ending July 31, stocks stood at 107.2 million barrels, reflecting a decline of 3.5 million barrels from the previous week. These levels are 5.1% lower than the same period last year and 16.1% below the corresponding 2024 figures. Since this category includes both diesel and heating oil, it serves as a key indicator of domestic middle-distillate availability in the fuel market.
Despite a slight easing from the prior week, retail diesel prices remained elevated. On August 10, the average nationwide price was $5.257 per gallon, down from $5.348 the previous week, yet well above the $4.578 recorded on July 6. Similar market pressures are evident in Europe. The premium for low-sulfur gasoil over crude reached a record $74.66 per barrel on July 30, illustrating the sharp rise in diesel’s value compared with crude oil.
Global Refinery Outages Tighten Product Flows
Reduced refinery operations have decreased the availability of diesel and other refined fuels for international markets. Damage from an attack affected a refinery in Russia’s Tatarstan region, compounding lower Russian processing activity. Saudi Arabia’s Jazan refinery has been offline since July 27 following an earlier attack, removing additional capacity from the global supply. As of June, refinery runs worldwide were below last year’s levels due to decreased processing in several key fuel-producing regions.
Export restrictions have further constrained supply. Russia extended limits on gasoline and diesel exports through January 31, 2027. Vessel traffic through the Strait of Hormuz, a vital route for oil shipments, has decreased. Additionally, China has exported fewer refined products amid weakening domestic refinery activity. The European Central Bank reported diesel pump prices near €1.98 per litre during the third week of July, with refining margins representing a larger share of retail costs.
US Refiners’ High Processing Rates Fail to Boost Stocks
Despite processing record amounts of crude oil in the first seven months of 2026—levels not seen since 2019—U.S. distillate inventories remain notably low. Strong refinery utilization has not been enough to restore diesel stocks to normal seasonal levels. At the start of August, inventories hit their lowest point for this time of year in nearly thirty years. The persistent tightness is driven by ongoing refinery disruptions and limited international product flows.
Oil prices also moved upward on Wednesday, with Brent crude near $89.81 a barrel and West Texas Intermediate around $84.08. Diesel markets remain under pressure as supplies of finished fuel are constrained across key regions. The fuel is extensively used in trucking, agriculture, construction, and manufacturing sectors. Low U.S. inventories, high European refining margins, refinery outages, and export restrictions have collectively maintained a tight diesel market across both regions as buyers compete for limited supplies.