US diesel prices have surged to a record average of $5.85 per gallon, marking an all-time high. This increase is primarily attributed to the six-month-long war with Iran, which has significantly disrupted the global flow of fuel, particularly impacting crude oil supplies from the Middle East. Before the conflict, diesel averaged around $3.76 per gallon, and the current price surpasses the previous peak of $5.82 reached in June 2022 after the Ukraine war.
This record high in diesel prices has broad economic implications. Diesel powers critical sectors like freight, agriculture, and industrial operations, meaning higher fuel costs translate directly into increased transportation and production expenses. Businesses across various sectors are already passing these costs on to consumers through added fees on online orders and packages, and analysts warn that sticker shock will continue to trickle into store shelves, especially for perishable goods like produce and meat. Experts like Andy Lipow, president of Lipow Oil Associates, highlighted that elevated diesel prices will ultimately raise food prices.
The global supply of distillate fuels, including diesel, is severely constrained. Distillate inventories in the US are at multi-decade lows, with August levels being the lowest since 1982. The East Coast, in particular, faces acute shortages, with inventories hitting a record low of 19.3 million barrels. Despite US refiners operating at multi-year highs, global refinery disruptions and export bans are limiting overall supply. Brent crude, the international benchmark, is trading at over $95 a barrel, up from roughly $70 before the war, reflecting the tight supply conditions. The diesel crack spread, a measure of refining profitability, also reached an intraday record of $108.02 a barrel.
The impact is expected to deepen, especially as seasonal demand for diesel rises. The upcoming months will see increased diesel consumption for harvesting in the Northern Hemisphere and planting preparations in the Southern Hemisphere. Additionally, demand for heating oil, a closely related distillate fuel, typically increases ahead of winter. Analysts from GasBuddy, like Patrick De Haan, predict that 2026 is on track to be the most expensive year for diesel in US history, with concerns that the current crisis could lead to even sharper price increases given the lowest inventories on record for early September. Some countries in Africa and Asia, heavily reliant on Middle Eastern imports, are already feeling severe energy shocks.
