UNITED STATES / RankWire.AI / – On September 5, the U.S. Energy Information Administration reported that the national on-highway diesel average hit a record $5.8819 per gallon. This marks a significant increase from the previous year, with diesel now costing over $2.16 more per gallon than the $3.7123 recorded one year earlier. Meanwhile, regular gasoline averaged $4.1459, up from $3.2046 a year earlier. The diesel figure surpassed the previous peak from June 2022, establishing a new high for a fuel essential to U.S. freight and agriculture sectors.
Prior to reaching this peak, diesel prices had already climbed to $5.85 a gallon on September 4, and the latest figure reflects an upward move the following day. This represents an increase of more than $2.16 compared to the same period last year. Although regular gasoline has also seen substantial rises, it remains below its June 2022 record. Diesel prices have accelerated faster, driven by global disruptions in refining and shipping that have tightened distillate fuel supplies. Additionally, heightened seasonal demand from farming and freight operations during late summer has contributed to the upward pressure on prices.
The U.S. Energy Information Administration noted a weekly on-highway diesel average of $5.599 per gallon for the week ending August 31. Its upcoming weekly update for gasoline and diesel, scheduled for September 9, has been delayed due to the Labor Day holiday. Wholesale diesel prices across major U.S. trading hubs also remain elevated. Rising crude oil prices have increased refinery feedstock costs, while international fuel flow disruptions have limited global suppliers’ ability to serve diesel markets.
Energy Markets Tighten as Diesel Prices Reach New High
Oil prices increased again on September 7 amid renewed conflict involving the United States and Iran, disrupting shipping lanes in the Gulf. Brent crude traded above $97 a barrel, while U.S. West Texas Intermediate crude surpassed $92. Tanker activity through the Strait of Hormuz remained below recent averages. This crucial waterway facilitates the movement of major oil and refined-product shipments from Gulf producers. Meanwhile, separate attacks on Russian refineries have reduced processing capacity, further constraining international supplies of diesel and other fuels.
According to AAA, the diesel average of $5.8819 on September 5 was the highest in the organization’s records. The previous diesel peak was $5.816 on June 19, 2022. California remains the most expensive large market, with diesel averaging approximately $7.81 per gallon, and regular gasoline in the state near $5.85. Fuel prices vary significantly across regions due to differences in taxes, refinery access, environmental regulations, and transportation distances from production centers to retail outlets.
Rising Fuel Costs Impact Freight and Agriculture
Diesel is vital for moving goods nationwide. Heavy trucks depend on it for long-distance freight, while farms utilize it in tractors and machinery. Construction equipment, delivery fleets, and some rail operations also consume substantial volumes. Consequently, the recent surge in diesel prices raises operating costs across multiple sectors. Retail diesel prices have tracked higher alongside crude oil and wholesale fuel markets, reflecting tighter supply chain conditions within the petroleum industry.
As of September 5, the national diesel average of $5.8819 is roughly 58% above its level from a year earlier. This sharp increase makes diesel one of the fastest-rising major transportation fuels in the U.S., directly impacting industries dependent on this vital energy source.