Gasoline and diesel prices continued rising across the United States in 2026, increasing household spending compared with last year. As of Sept. 21, regular gasoline averaged $4.44 per gallon nationwide, up 18.5 cents from the prior week and $1.28 from a year earlier. Diesel averaged $6.49 per gallon, rising 30.7 cents weekly and $2.83 annually. Michigan, Indiana, Illinois and Ohio recorded some of the largest increases for both fuels, as refinery issues affected the Great Lakes region. Texas had the cheapest regular gasoline and diesel, while California had the highest prices for both. The material also notes that United States Oil Fund shares were retreating from recent levels.