The US national average price of a gallon of gasoline reached $4.48 on Friday, September 18, 2026, according to AAA as cited by The Associated Press, up roughly 17 cents in a week, 40 cents in a month and $1.27 from a year ago, at a time of year when prices usually fall.

The national average diesel price hit $6.44 a gallon on Friday, 71% above its prewar level, with daily record highs since September 11, according to NBC News, which attributes part of the pressure to Russia’s extension of a diesel export ban through the end of September after Ukrainian drone strikes on Russian energy assets. Donald Trump said last week that the surge is an “inexpensive price to pay” for the war with Iran and publicly demanded that Volodymyr Zelenskyy stop striking refineries: “Mr. Zelenskyy has to do one thing. He has to stop knocking out diesel fuel in Russia,” he said, according to NBC News. A Fox News survey released on September 16, 2026, found that 61% of voters call gasoline prices a major problem for their household, against 48% two years earlier, and that nearly two-thirds, 63%, say the administration has made the economy worse, compared with 52% in September 2025. Early voting in the November 3 midterm elections is already under way, and G1 highlighted that the surge strains household budgets and deepens dissatisfaction with Trump.