UNITED STATES / RankWire.AI / – U.S. diesel prices climbed to a record $5.8819 a gallon on September 5. The latest national average extended a sharp rise that has pushed fuel costs far above year-ago levels. Diesel averaged $3.7123 a gallon one year earlier. Regular gasoline stood at $4.1459, compared with $3.2046 a year earlier. The diesel reading surpassed the previous record from June 2022 and marked a new high for a fuel central to U.S. freight and agriculture.
Diesel prices had already reached $5.85 a gallon on September 4 before moving higher the following day. The latest reading represents an increase of more than $2.16 from a year earlier. Regular gasoline has also risen sharply, but it remains below its June 2022 record. Diesel has climbed faster because global refining and shipping disruptions have tightened supplies of distillate fuels. Strong seasonal demand from farming and freight activity has added pressure to the market during the late summer period.
The U.S. Energy Information Administration reported a national on-highway diesel average of $5.599 a gallon for the week ending August 31. Its next weekly gasoline and diesel update is scheduled for September 9 because of the Labor Day holiday. Wholesale diesel prices have also remained elevated across major U.S. trading centers. Higher crude prices have increased refinery feedstock costs, while disruptions to international fuel flows have reduced the flexibility of global suppliers serving diesel markets.
Diesel record extends as energy markets tighten
Oil prices rose again on September 7 as renewed fighting involving the United States and Iran disrupted shipping conditions 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. The waterway carries major oil and refined-product shipments from Gulf producers. Separate attacks on Russian refineries have also reduced processing capacity and constrained international supplies of diesel and other fuels.
AAA listed the September 5 diesel average of $5.8819 as the highest recorded national price in its data. The organization placed the previous diesel record at $5.816 on June 19, 2022. California remained the most expensive major market, with diesel averaging about $7.81 a gallon. The state also recorded regular gasoline near $5.85. Fuel costs vary widely by region because of taxes, refinery access, environmental requirements and transportation distances between production centers and retail markets.
Freight and farming face higher fuel costs
Diesel plays a central role in the movement of goods across the United States. Heavy trucks rely on the fuel for long-distance freight, while farms use it in tractors and other machinery. Construction equipment, delivery fleets and some rail operations also consume large volumes. The latest price increase therefore raises operating costs across several parts of the economy. Retail diesel prices have climbed alongside crude oil and wholesale fuel markets, reflecting tighter conditions throughout the petroleum supply chain.
The new record arrives as U.S. refiners operate at high utilization rates while global refinery disruptions limit additional supply. Domestic crude production remains near historic highs, but diesel prices depend on more than crude availability alone. Refining capacity, inventories, shipping routes and international product flows also shape retail costs. As of September 5, the national diesel average stood about 58% above its year-earlier level. That increase makes diesel one of the most sharply rising major transportation fuels in the United States.