Diesel is trading above $200 a barrel in both the United States and Europe as sustained disruption around the Strait of Hormuz compounds supply losses from the Middle East and Russia. The waterway carries roughly a fifth of the world's petroleum supply, including about 900,000 barrels a day of Middle Eastern diesel before the conflict began in late February 2026. US diesel prices reached between $6.06 and $6.31 a gallon by mid-September, up 55% to 78% from pre-war levels of $3.52 to $3.75. Earlier reporting cited a higher single-day national average of $6.45, reflecting differing measurement dates. Diesel crack spreads have exceeded $100 a barrel for the first time on record, compared with about $60 during the early months of the Russia-Ukraine war in 2022. From March through August, Middle Eastern diesel supply losses averaged about 770,000 barrels a day, while Russian restrictions removed roughly 350,000 barrels a day. US households and businesses have paid an estimated $100.9 billion more for gasoline and diesel since the conflict began, including about $46 billion for diesel. Global distillate inventories are projected to remain critically low into 2027, keeping pressure on freight, farming, construction and other diesel-dependent sectors.