UNITED STATES / RankWire.AI / – On September 5, the cost of diesel across the U.S. surged to an all-time peak of $5.8819 per gallon. This latest jump extended a notable upward trend that has driven fuel prices well above those from the previous year. A year earlier, diesel averaged $3.7123 a gallon, while regular gasoline was at $4.1459 compared to $3.2046 last year. The current diesel figure surpassed the previous record set in June 2022, establishing a new high for a fuel vital to U.S. freight and agriculture sectors.
Prior to reaching this peak, diesel prices had already hit $5.85 a gallon on September 4, before climbing further the next day. The latest figure indicates an increase of over $2.16 from the same period last year. Although regular gasoline has experienced significant increases, it remains below its June 2022 record. The faster rise in diesel prices is attributed to global disruptions in refining and shipping, which have tightened supplies of distillate fuels. Additionally, strong seasonal demand driven by farming and freight activities has added further pressure during the late summer months.
U.S. Energy Information Administration reported that the national on-highway diesel average for the week ending August 31 was $5.599 a gallon. Its upcoming weekly update on gasoline and diesel prices is scheduled for September 9, due to the Labor Day holiday. Wholesale diesel prices have also remained elevated across key U.S. trading hubs. Rising crude oil prices have increased refinery feedstock costs, and international fuel supply disruptions have reduced the flexibility of global suppliers in serving diesel markets.
Energy market tightening fuels diesel record highs
Oil prices increased again on September 7 amid renewed conflict involving the United States and Iran, which disrupted shipping in the Gulf. Brent crude traded over $97 a barrel, while U.S. West Texas Intermediate crude moved above $92. Tanker traffic through the Strait of Hormuz remained below recent averages. This strategic waterway is a key route for major oil and refined product shipments from Gulf producers. Separate attacks on Russian refineries have also impacted processing capacity, further constraining international supplies of diesel and other fuels.
According to AAA, the diesel average of $5.8819 on September 5 is the highest ever recorded nationally, surpassing the previous peak of $5.816 on June 19, 2022. California remains the most expensive major market, with diesel prices around $7.81 a gallon, and regular gasoline approaching $5.85. Fuel prices vary significantly across regions due to factors such as taxes, refinery access, environmental regulations, and transportation distances from production to retail outlets.
Rising fuel costs impact freight and agriculture sectors
Diesel plays a crucial role in the transportation of goods nationwide. Heavy trucks depend on it for long-haul freight, while farms rely on diesel-powered tractors and machinery. Construction equipment, delivery fleets, and some rail operations also consume substantial volumes. Consequently, the recent surge in prices leads to increased operating costs across multiple industries. Retail diesel prices have moved in tandem with crude oil and wholesale fuel markets, reflecting tighter conditions across the petroleum supply chain.
This new record coincides with high utilization rates among U.S. refiners, compounded by ongoing global refinery disruptions that limit additional supply. Although domestic crude production remains near historic highs, diesel prices are influenced by more than just crude availability. Factors such as refining capacity, inventories, shipping routes, and international product flows also play a vital role in determining retail costs. As of September 5, the national diesel average was approximately 58% higher than a year earlier, making it one of the fastest-rising major transportation fuels in the United States.