U.S. motorists paid an average of $4.15 per gallon for regular unleaded gasoline on Sept. 6, the highest Labor Day weekend price ever recorded, according to AAA. The figure remains below the all-time gasoline record of $5.02 set in June 2022, but is sharply above $3.20 a year earlier. GasBuddy analyst Patrick De Haan attributed the unusual seasonal increase to higher global oil prices linked to the Iran war and reduced Russian refinery capacity amid ongoing attacks in Russia's war with Ukraine. Diesel also set a record, reaching $5.85 per gallon on Sept. 3, above the previous high of $5.82 in June 2022. De Haan said 2026 is likely to become the most expensive year for diesel fuel in U.S. history.