Business & Markets
U.S. diesel reaches record $5.85 a gallon as freight costs climb
AAA's daily average surpassed the 2022 peak as the Iran war constrains fuel flows; the increase is already reaching shipping surcharges and other transport-heavy businesses.
Executive summary
- The record: AAA's national average for diesel reached $5.85 a gallon Friday, the highest nominal price in its series and above the previous 2022 peak.[1][2][3]
- The increase: The daily average rose from $5.78 Thursday, $5.61 a week earlier and $3.71 a year earlier.[1]
- The pressure: Higher diesel costs are feeding into freight and delivery expenses, with major carriers adjusting fuel surcharges and smaller operators facing sharper margin pressure.[2][3]
- The context: The price is a current-dollar record, not an inflation-adjusted one; AP calculated that the 2008 diesel peak would equal about $7.20 in 2026 dollars.[2]
The national average price of diesel reached a record $5.85 a gallon Friday, according to AAA, surpassing the previous nominal high set in 2022. The increase raises costs across trucking, agriculture, construction and delivery networks that depend on the fuel, creating a new channel for the energy shock to reach consumer prices.[1][2][3]
AAA's daily measure rose from $5.78 Thursday and $5.61 a week earlier. A year ago, the same national average was $3.71. The Energy Information Administration's separate weekly survey put on-highway diesel at $5.60 for the week ending August 31, before the final move to Friday's record in AAA's more current series.[1][4]
The Associated Press tied the rise to the six-month war with Iran and the disruption of global fuel flows, including constrained tanker traffic through the Strait of Hormuz. Diesel markets are especially exposed because the fuel moves by sea and powers much of the equipment used to move goods after they reach port.[2]
The cost pressure is already visible in shipping. Axios reported that FedEx and UPS had raised fuel surcharges, while smaller trucking and farming businesses have less ability to absorb rapid increases. Food can be particularly sensitive because diesel powers tractors, harvest equipment and the trucks that repeatedly move perishable products through the supply chain.[3][2]
The $5.85 figure is a record in current dollars, not after adjusting for inflation. AP calculated that diesel's 2008 peak of about $4.74 a gallon would equal roughly $7.20 in 2026 dollars. Even so, the speed and breadth of the current increase make diesel an immediate operating-cost problem for transport-heavy businesses and a potential source of additional goods inflation.[2][3]