UNITED STATES / RankWire.AI / – The U.S. Energy Information Administration reported that the national on-highway diesel average reached $5.8819 per gallon on September 5, marking a fresh all-time high and continuing an aggressive upward trend nationwide. One year prior, the average price was $3.7123 a gallon. Meanwhile, regular gasoline averaged $4.1459, up from $3.2046 during the same period last year. Diesel has now surpassed the previous record established in June 2022. This surge has pushed fuel expenses to their highest level ever for truckers, farmers, and other major diesel consumers.
Prior to this record, the national diesel average on September 4 was already at $5.85 per gallon, exceeding the former peak before prices climbed again the following day. Currently, diesel costs are over $2.16 per gallon higher than at the same time last year. Although regular gasoline prices have also increased, their national average still remains below the 2022 peak. The recent rise in U.S. energy markets has largely been driven by higher crude oil costs and tighter supplies of refined fuels.
On September 5, AAA recorded the national diesel average at $5.8819, eclipsing the previous record of $5.816 set on June 19, 2022. California continues to have the highest diesel prices in the country, with an average close to $7.81 per gallon. In the state, regular gasoline is near $5.85. Regional variations in pump prices persist due to factors such as taxes, refinery access, fuel standards, and transportation costs. These elements cause significant disparities among coastal markets, inland states, and key fuel-producing areas.
Global Fuel Supply Tightens, Driving Diesel Prices Higher
The U.S. Energy Information Administration also reported that for the week ending August 31, the on-highway diesel average was $5.599 per gallon. Its upcoming weekly update, scheduled for September 9, will take into account the Labor Day holiday. Wholesale diesel prices remain elevated across key U.S. trading hubs, as refiners encounter increased crude costs and international supply disruptions restrict fuel flows. These conditions have kept diesel markets tight despite high utilization rates among domestic refineries.
Oil prices surged on September 7 amid conflicts involving the United States and Iran, which disrupted shipping in the Gulf region. Brent crude traded above $97 a barrel, with West Texas Intermediate surpassing $92. Additionally, tanker traffic through the Strait of Hormuz remained below recent averages, as this route handles substantial volumes of crude oil and refined products from Gulf producers. Attacks on Russian refineries have also contributed to reduced processing capacity and tighter global supplies of diesel and other refined fuels.
Rising Fuel Costs Impact Freight and Agriculture Sectors
Diesel fuels the majority of the U.S. freight network and remains vital across numerous industries. Long-haul trucks rely on it to transport goods between ports, warehouses, factories, and retail outlets. Farmers depend heavily on diesel-powered machinery such as tractors and harvesters. Construction equipment, commercial fleets, and certain rail operations also consume large quantities. The recent price increase has consequently raised operating expenses across transportation, agriculture, and construction sectors. Due to its extensive industrial importance, diesel prices influence broader economic activities more than passenger fuels alone.
Although U.S. crude oil production stays near historic highs, diesel prices are affected by various segments of the fuel supply chain. Refining capacity, inventories, shipping routes, and international product flows all play roles in determining retail costs. Disruptions in global refining have limited available supplies while seasonal demand for freight and agricultural activities remains robust. By September 5, the national diesel average was approximately 58% higher than its level a year earlier. This trend confirms diesel as one of the fastest-growing major transportation fuels in the United States.