Diesel Hits $6.18 a Gallon Nationally; California Tops $8
The U.S. average retail price for on-highway diesel stood at $6.179 per gallon in the data dated 10/12/26, about $1.85 above the $4.331 national average for regular gasoline. Regional diesel prices ranged from $5.645 in the Lower Atlantic to $7.240 on the West Coast, with California at $8.091.