The national average retail price for a gallon of diesel fuel fell to $2.43 for the week ending Monday, Dec. 5.
While still 35.6 cents higher than the same week in 2004, the 5.4-cent drop is the latest decline in fuel prices. The average peaked in October with a gallon of diesel going for $3.16.
Prices fell in all regions of the United States, with the Midwest the lowest at $2.39 per gallon. The Rocky Mountain area had the highest regional average at $2.47.
For state-by-state daily diesel prices, click here.