At an average cost of $5.97 a gallon, California’s diesel price is 43.5 cents higher than the next most expensive region. (Aziz Shamuratov/Getty Images)

The national average diesel price kept on its upward course, climbing 4.8 cents to reach $4.54, according to Energy Information Administration data released Sept. 11.


  • Diesel’s average price has risen for eight straight weeks, with the increases totaling 73.4 cents.
  • The most recent price decline for trucking’s main fuel was a 3.9-cent drop July 10.
  • A gallon of diesel on average now costs 49.3 cents less than it did at this time in 2022.
  • The average price of diesel increased in nine of the 10 regions in EIA’s weekly survey. The exception was a dip of two-tenths of a cent in the Lower Atlantic. The biggest gain, 16.9 cents, was found in California.
  • The West Coast, the West Coast less California and California are the only regions in which a gallon of diesel on average costs more than $5 a gallon.
  • The average price for a gallon of gasoline nudged up 1.5¢ a gallon on average and now costs 13.2¢ more than it did at this time a year ago.

U.S. On-Highway Diesel Fuel Prices

EIA regional fuel chart