Diesel fuel prices increased across the nation according to the Gasoline and Diesel Fuel Update released by the EIA December 30, 2013. The national average diesel fuel prices increased three cents from last week to $3.90 per gallon. The Midwest and Rocky Mountain prices both jumped four cents to an average of $3.89 per gallon in both regions. The West Coast average diesel fuel price also rose by four cents to $4.03 per gallon. Increasing two cents, the average diesel fuel price on the East Coast and Gulf Coast is now at $3.94 per gallon and $3.79 per gallon respectively.