The national average price for diesel in the United States reached $6.05 a gallon on September 11, the first time the benchmark has crossed $6, according to AAA figures reported by Transport Topics. The average stood at $5.85 a week earlier and $3.70 at the same point in 2025. Disrupted global fuel flows tied to the conflict involving Iran carried crude oil above $100 a barrel and pushed diesel to the record.
Diesel powers most freight and delivery networks, so the increase raises transportation costs across a wide range of goods. Some businesses have already added fees to online orders and mailed packages. Grocery aisles face early exposure because perishable categories such as meat and produce require frequent hauling and restocking, and much of the farm equipment used at harvest runs on the same fuel.
Fleets typically recover part of the increase through fuel surcharges written into shipper contracts. Surcharge tables lag spot movements, which leaves carriers absorbing the gap during rapid climbs. Owner operators and small fleets running spot freight carry the heaviest exposure, since they negotiate rates load by load with no contractual floor.
S&P Global Energy said Middle East oil production is unlikely to return to prewar levels by 2027, which signals sustained pressure on fuel markets. Carriers heading into the fall harvest and the winter heating season face a stretch when distillate demand climbs while refinery output seasonally declines.
Source: Transport Topics - https://www.ttnews.com/articles/diesel-prices-soar-record