NEW YORK / RankWire.AI / – Fuel prices for diesel remained elevated on Wednesday, driven by constrained inventories and refinery outages affecting supply in both the United States and Europe. U.S. ultra-low sulfur diesel futures surged 7.4% on Monday, closing at $4.19 a gallon, marking the largest single-day increase since July 13. Early Wednesday, the contract traded near $4.28 a gallon, as refined-product markets kept reflecting tight supply conditions across key consuming regions.
Despite recent declines, U.S. diesel stockpiles are still significantly below seasonal averages. According to the U.S. Energy Information Administration, the weekly distillate reserves for the week ending July 31 stood at 107.2 million barrels. This was 3.5 million barrels lower than the previous week, and inventories remained 5.1% below the same period last year, as well as 16.1% beneath the level recorded in 2024. Distillates, which include diesel and heating oil, are vital for transportation, industrial operations, and seasonal energy needs.
Even though retail diesel prices have seen a slight weekly dip, they still remain high overall. On August 10, the U.S. national average reached $5.257 per gallon, down from $5.348 a week earlier but still well above the $4.578 recorded on July 6. Similarly, European fuel markets are experiencing pressure, with low-sulfur gasoil margins increasing sharply. The premium over crude oil hit a record $74.66 per barrel on July 30, as finished diesel commands higher market values.
Refinery disruptions shrink global diesel supplies
Several refinery outages have further constrained the global supply of diesel available to international markets. An attack on a refinery in Russia’s Tatarstan region has caused damage and contributed to reduced processing activity within the country. Meanwhile, Saudi Arabia’s Jazan refinery has remained offline since July 27 following an earlier attack, removing another significant source of refined products from the global trade flow. During June, refinery runs in several key producing regions fell below last year’s levels, limiting the amount of fuel entering international markets.
Additional restrictions on exports have tightened supply channels. Russia extended limits on gasoline and diesel exports through January 31, 2027. Meanwhile, vessel traffic through the Strait of Hormuz from the Middle East has sharply declined. At the same time, China has exported fewer refined fuels amid weakening domestic refinery activity. The European Central Bank indicated that diesel pump prices hovered near €1.98 per litre in the third week of July, with rising refining margins contributing to a larger share of retail fuel costs.
US refinery throughput remains high despite low inventories
In the United States, refiners continue processing substantial volumes of crude oil, yet diesel inventories have not recovered to typical seasonal levels. Crude input during the first seven months of 2026 reached the highest for that period since 2019. Refinery utilization rates have stayed robust as processing margins widened. Despite this, distillate stocks at the start of August are at their lowest for this time of year in nearly thirty years. This supply shortfall coincides with decreased product flows from several overseas refining centers.
Crude oil prices also advanced on Wednesday, with Brent near $89.81 a barrel and West Texas Intermediate around $84.08. Diesel prices face increased pressure primarily because of shortages in finished fuel rather than crude supply alone. Diesel is critical for trucking, agriculture, construction, manufacturing, and other commercial sectors across both regions. Persistent low U.S. inventories, high European refining margins, refinery outages, and export restrictions continue to underpin a tight global market for diesel and similar middle-distillate fuels.