Diesel Prices Now Higher Than They Were Under Biden

September 04, 2026 11:30 AM ET Diesel prices in the U.S. climbed to a record high Friday as the war in Iran and disruptions to global refining capacity tightened fuel supplies.The national average for diesel reached $5.85 per gallon Friday, according to AAA, surpassing the previous national record set in 2022 during the global energy crunch that followed Russia’s invasion of Ukraine during the presidency of Joe Biden. The national average for diesel prices was $3.72 in February, the month the Iran war began, per the Bureau of Transportation Statistics.The average US diesel price climbed above $5 per gallon in spring 2022 — following the escalation of the Ukraine war — and reached a peak of roughly $5.81 per gallon during the week of June 20, 2022, according to Energy Information Administra