NEW YORK / RankWire.AI / – On Wednesday, diesel prices maintained elevated levels amid tightening supplies of refined products, exerting upward pressure on fuel markets across the United States and Europe. U.S. ultra-low sulfur diesel futures surged 7.4% on Monday, settling at $4.19 a gallon, marking their largest single-day increase since July 13. Early trading on Wednesday pushed the contract close to $4.28 per gallon, while diesel refining margins in Europe stayed at historic highs after rising nearly 10% on Monday.
The average retail price for diesel in the U.S. stood at $5.257 per gallon on August 10, down slightly from $5.348 a week prior but still significantly above the $4.578 average recorded on July 6. According to the U.S. Energy Information Administration, distillate inventories decreased by 3.5 million barrels during the week ending July 31, falling to 107.2 million barrels from 110.6 million barrels the previous week. This stock level is 5.1% below the same period last year and 16.1% lower than two years ago.
Europe has also seen elevated costs associated with converting crude oil into diesel. The premium for European low-sulfur gasoil over crude hit a record $74.66 per barrel on July 30. Additionally, European diesel margins increased by nearly 10% on August 10. The European Central Bank reported that diesel pump prices hovered around €1.98 per litre in the third week of July. Its analysis indicated that refining margins contributed approximately €0.35 per litre during the first three weeks of July, a notable rise from earlier levels.
Refinery disruptions constrain diesel availability
Disruptions at refineries have further reduced fuel output in a market already facing supply constraints. An attack targeted a refinery in Russia’s Tatarstan region, compounding the decline in Russian refining activity. Saudi Arabia’s Jazan refinery has remained offline since July 27 following an earlier attack. These outages impact regions that typically supply large volumes of refined petroleum products to global markets. Throughout June, refinery runs globally had already fallen significantly below last year’s levels, with major centers operating at reduced throughput.
Russia has also limited diesel exports to international markets by extending restrictions on gasoline and diesel shipments through January 31, 2027. Meanwhile, product shipments from the Middle East have faced additional hurdles due to sharply reduced vessel traffic through the Strait of Hormuz, which has fallen far below pre-conflict levels. China’s decreased refining activity has further curtailed the flow of petroleum products into global markets during a period of high refining margins.
Refining activity remains high, but supply remains tight
Despite substantial crude processing, U.S. domestic fuel inventories continue to be at low levels. Federal energy data show that crude inputs to U.S. refineries during the first seven months of 2026 reached their highest point since 2019. Refinery utilization rates have stayed high supported by robust margins, but distillate inventories as of early August are the lowest for this time of year in roughly three decades. Diesel and heating oil comprise the distillate inventory category tracked weekly in U.S. petroleum statistics.
Crude oil prices also edged higher on Wednesday, with Brent approaching $89.81 per barrel and U.S. West Texas Intermediate near $84.08. The diesel market faces increased pressure as available supplies tighten amid refinery disruptions and export restrictions. Diesel remains a vital fuel for trucking, agriculture, construction, manufacturing, and other commercial sectors. The combination of low U.S. inventories, record-high European refining margins, and reduced international refinery output continues to tighten the refined-product markets across both the Atlantic and beyond.