UNITED STATES / RankWire.AI / – According to the U.S. Energy Information Administration, diesel prices across the nation hit an all-time high of $5.8819 a gallon on September 5. This latest surge extended a significant upward trend that has pushed fuel costs well above levels from a year ago. One year earlier, diesel averaged $3.7123 a gallon. Meanwhile, regular gasoline was at $4.1459, compared to $3.2046 during the same period last year. The diesel figure surpassed the previous record set in June 2022, representing a new peak for a fuel critical to U.S. freight and agriculture sectors.
Before reaching this peak, diesel prices had already climbed to $5.85 a gallon on September 4, and then increased further on the following day. The current figure reflects a rise of more than $2.16 from the same time last year. While regular gasoline has also experienced sharp increases, it remains below its June 2022 record. The faster ascent of diesel prices is driven by global disruptions in refining and shipping, which have tightened supplies of distillate fuels. Additionally, heightened seasonal demand from farming activities and freight transport has exerted additional pressure on the market during late summer.
Throughout the week ending August 31, the U.S. Energy Information Administration reported a national on-highway diesel average of $5.599 per gallon. Its upcoming weekly update for gasoline and diesel prices is scheduled for September 9 due to the Labor Day holiday. Wholesale diesel prices have also stayed elevated across key U.S. trading hubs. Rising crude oil costs have increased refinery feedstock expenses, and international fuel flow disruptions have decreased the global suppliers’ flexibility in serving diesel markets.
Energy Markets Tighten as Diesel Record Continues to Rise
Oil prices increased again on September 7 amid renewed conflicts involving the United States and Iran, which disrupted shipping in the Gulf. Brent crude traded above $97 a barrel, while U.S. West Texas Intermediate crude moved above $92. Tanker traffic through the Strait of Hormuz remained below recent averages, affecting major oil and refined-product shipments from Gulf producers. Additionally, separate attacks on Russian refineries have reduced processing capacity and constrained global supplies of diesel and other fuels.
The U.S. Energy Information Administration reports that the September 5 diesel average of $5.8819 is the highest recorded in its data. The previous diesel record was $5.816 on June 19, 2022. California continues to be the most expensive major market, with diesel averaging approximately $7.81 per gallon. The state also recorded regular gasoline prices near $5.85. Regional variations in fuel costs are significant and are influenced by taxes, refinery access, environmental standards, and transportation distances from production centers to retail outlets.
Rising Fuel Prices Impact Freight and Agriculture
Diesel is a vital fuel for transporting goods across the U.S., powering heavy trucks for long-haul freight, tractors, and other agricultural machinery. Construction equipment, delivery fleets, and some rail services also rely heavily on diesel. The recent price surge increases operational costs across multiple sectors of the economy. Retail diesel prices have risen in tandem with crude oil and wholesale fuel markets, reflecting tighter conditions throughout the petroleum supply chain.
This new record coincides with U.S. refiners operating at high capacity while global refinery disruptions limit additional supplies. Although domestic crude production remains near historic highs, diesel prices are influenced by factors beyond crude availability, including refining capacity, inventories, shipping routes, and international fuel flow. As of September 5, the national diesel average is about 58% higher than it was a year earlier. This sharp increase makes diesel one of the fastest rising major transportation fuels in the United States.