The national average price for diesel fuel in the United States has surpassed $6 per gallon, reaching a new record high as escalating conflict in the Middle East disrupts global fuel flows. The average price stood at $6.05 per gallon on Friday, an increase from $5.85 the previous week and significantly higher than the $3.70 average recorded a year ago, according to AAA.
This surge in diesel prices directly impacts the cost of transporting a wide array of everyday goods, as the fuel is essential for many freight and delivery networks. Some businesses have already begun passing these increased costs onto consumers through surcharges on online orders and mail packages. Shoppers are likely to experience higher prices, particularly for groceries, as perishable items like meat and produce require frequent restocking and can be affected by fuel-intensive farming equipment.
While it may take time for these costs to fully trickle down the supply chain, the elevated diesel prices show no immediate signs of abating. The prices at the pump for both diesel and regular gasoline closely follow crude oil prices, which have recently seen a renewed climb. Both Brent crude, the international benchmark, and U.S. crude surpassed $100 a barrel for the first time in months this week, coinciding with intensified fighting between the U.S. and Iran. President Trump has suggested that oil prices might not decrease until after the November midterm elections.
American diesel prices are now substantially higher than they were before the U.S. and Israel launched military operations against Iran in late February, when the national average was approximately $3.76 per gallon. Prices climbed rapidly as the cost of crude oil, the primary component of refined fuels, surged due to supply chain disruptions in the Middle East, particularly with tanker traffic bottlenecked in the Strait of Hormuz. Although prices had cooled slightly during periods of de-escalation earlier in the summer, they have resumed their upward trend as the conflict intensifies.
Brent crude was trading above $105 a barrel on Friday, up from around $70 before the conflict began. While inflation-adjusted prices have been higher in the past—diesel reached an inflation-equivalent of $7.20 per gallon in 2008 and a then-record $6.56 in 2022 when accounting for inflation—the current steep prices are already creating ripple effects across the economy and the cost of living. Regular gasoline also saw its average price climb to $4.29 per gallon on Friday, up from $2.98 before the conflict, though still below the 2022 peak of nearly $5.02.
Diesel has historically been more expensive than gasoline in the U.S., and its price has risen at a faster pace on occasion. Factors contributing to this include less flexibility in demand and diesel's critical role in global commerce. While households may reduce driving in response to high gasoline prices, there are fewer immediate substitutes for industries reliant on diesel for hauling goods worldwide.
The entire food supply chain is deeply reliant on diesel. It powers farm equipment, fishing boats, and the trains and trucks that transport food to grocery stores. Fuel costs typically account for 15% to 30% of a food item's total cost, according to the Independent Grocers Alliance. Perishable goods are often the first to experience price increases, as noted by David Ortega, a professor of food economics and policy at Michigan State University, with seafood prices up 7% and fresh fruit prices up 4.9% in July compared to the previous year. While other factors can influence prices, such as demand drops, consumers may face increasing costs as contracts are repriced and fuel surcharges are implemented.
Beyond groceries, shipping companies like Amazon, United Parcel Service, FedEx, and the United States Postal Service have implemented or adjusted fuel surcharges on packages due to rising costs. The ramifications extend to other diesel-transported goods such as clothing, cosmetics, and furniture. Public transit buses and trains, as well as diesel generators used for backup power in some regions, also face increased operational expenses. Experts warn that the consequences could be particularly severe in African and Asian countries that depend more heavily on Middle East imports and have already been significantly impacted by energy price shocks. For example, diesel prices in Nigeria have surged over 90% since late February, with Indonesia and Lebanon also experiencing significant increases. S&P Global Energy projects that crude oil production in the Middle East may not return to pre-war levels until the end of 2027, indicating a prolonged period of constrained supply and potentially higher prices.