NEW YORK / RankWire.AI / – Amid ongoing supply constraints driven by limited inventories and refinery disruptions, diesel prices in both the United States and Europe have remained elevated. U.S. ultra-low sulfur diesel futures surged by 7.4% on Monday, reaching $4.19 per gallon, marking the largest single-day increase since July 13, with the contract trading close to $4.28 early Wednesday. Meanwhile, European diesel refining margins have also stayed at historically high levels, having gained nearly 10% at the beginning of the week.
Diesel stocks in the U.S. have dropped to levels rarely observed during the summer months. According to the U.S. Energy Information Administration, the weekly distillate stockpiles ended July 31 at 107.2 million barrels, representing 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% below the corresponding level in 2024. Since distillates include both diesel and heating oil, they serve as a key indicator of fuel availability in the market.
In retail markets, diesel prices have also remained significantly above their summer averages, with the national U.S. average reaching $5.257 per gallon on August 10, compared to $5.348 one week earlier, and $4.578 per gallon on July 6. Europe faces similar pressures, as elevated refining costs have pushed the premium for low-sulfur gasoil over crude to a record $74.66 per barrel on July 30, emphasizing the unusually high value attributed to finished diesel products.
Refinery outages intensify fuel supply concerns
The market’s tightening is further worsened by supply disruptions from several key refining centers operating below normal capacities. Notably, a refinery in Russia’s Tatarstan region suffered damage from an attack, contributing to reduced Russian processing activity. Additionally, Saudi Arabia’s Jazan refinery has remained offline since July 27 following an earlier attack, effectively removing a source of refined products from international trade. During June, global refinery runs were already significantly below last year’s levels, as various regions reported lower processing volumes.
Export restrictions have also added to the supply squeeze, with Russia extending limits on gasoline and diesel shipments through January 31, 2027. Export activity from the Middle East has slowed due to decreased vessel traffic through the Strait of Hormuz. Meanwhile, China’s domestic refinery activity has weakened, leading to a reduced contribution of refined fuels 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 experienced sharp increases.
Low stock levels continue to exert pressure on diesel markets
Despite high crude processing rates at U.S. refineries during the first seven months of 2026—levels not seen since 2019—distillate inventories have not returned to normal seasonal levels. Stocks entered August at their lowest point for this time of year in approximately three decades, leaving the U.S. fuel sector vulnerable to fluctuations in refinery output and international product flows. This inventory scarcity has kept the market tightly balanced and sensitive to any changes in supply.
Crude oil prices also rose on Wednesday, with Brent crude approaching $89.81 a barrel and West Texas Intermediate around $84.08. The pressure on diesel prices is particularly strong because supplies of finished products remain limited across key markets. Diesel is crucial for sectors such as trucking, agriculture, construction, and manufacturing, which rely heavily on it for their operations. The combination of low inventories in the U.S., elevated refining margins in Europe, refinery outages, and export restrictions has kept diesel markets strained on both sides of the Atlantic, underpinning persistent high prices.