U.S. diesel prices pushed deeper into record territory in September, tightening pressure on truckers, farmers and businesses that rely on fuel to move goods. Reuters reported on September 23 that diesel prices had surged to records above $6.50 a gallon, while AAA data cited by the Associated Press showed a national average of $6.52 that day.
The price run-up has also revived scrutiny of President Donald Trump’s earlier comments on fuel costs. In August, Trump said he would “never apologize” as gasoline prices rose alongside the administration’s military confrontation with Iran, a remark that has resurfaced as diesel, the fuel that drives much of the freight economy, sets new highs.
Diesel prices moved past earlier peaks in September
The latest jump followed a month of rapid increases. Reuters reported on September 10 that the U.S. national average price of diesel had surpassed $6 a gallon for the first time ever, according to GasBuddy. By September 23, Reuters said diesel prices had shot to records over $6.50 a gallon.
AAA’s consumer price tracker also showed the surge building through the month. Search results from AAA data showed a national diesel average of $6.3103 on September 16, then the Associated Press reported $6.52 on September 23. Earlier in the month, Reuters and other reports said the national average had broken the old June 2022 record.
The political backdrop sharpened the story. Reuters reported on August 14 that Trump urged Americans to accept slightly higher gasoline prices as the cost of preventing Iran from obtaining a nuclear weapon. In that report, Reuters said Trump added he would never apologize for attacking Iran. An ABC News transcript from September 6 also quoted Trump saying, “I’ll never apologize,” while discussing higher gasoline prices and refinery policy.
Diesel matters differently than regular gasoline because it is used across freight, farming and industrial supply chains. Reuters reported on September 10 that record diesel prices were likely to affect “every cargo, shipment, every delivery Americans are taking,” a warning that points to broader consumer costs as goods move by truck, rail and equipment powered by distillate fuel.
The Associated Press described diesel as fuel that powers “the global economy and the American heartland,” linking the spike to immediate political and economic strain. That matters locally because most communities feel diesel inflation indirectly, through grocery deliveries, construction costs, school bus fleets and farm operations, even when drivers do not buy diesel themselves.
What remains less clear is how much relief consumers can expect soon. Reuters reported on September 23 that the White House denied a report that the United States was preparing a 90-day diesel export ban to control prices. That denial left the administration defending its broader energy strategy while prices stayed elevated.
The clearest cause cited across reports is a supply squeeze tied to war and refinery constraints. Reuters reported on September 21 that diesel prices in Europe and the United States had rallied to record highs as wars in Iran and Ukraine sharply cut exports from major producers including Russia, Saudi Arabia and the United Arab Emirates.
U.S. conditions have added to the pressure. The Energy Information Administration said in its September 2026 Short-Term Energy Outlook that U.S. distillate fuel oil inventories, often sold as diesel, were forecast to fall below 100 million barrels in September and remain below the five-year low through the end of 2026 and most of 2027.
That backdrop helps explain why the debate has intensified in Washington. Reuters reported on September 23 that potential restrictions on U.S. diesel exports pushed diesel refining margins to a record high, even as oil prices softened. For households and businesses, the immediate fact is simpler: diesel has set fresh records, and the squeeze is now feeding directly into transport and delivery costs across the country.