The national average diesel fuel price is now $3.91 per gallon according to the Gasoline and Diesel Fuel Update released by the EIA, one cent higher than last week. Increasing less than a penny the Midwest’s average diesel fuel price remains at $3.89 per gallon. The Gulf Coast region has the lowest average diesel fuel price at $3.80 per gallon, one cent higher than what it was last week. Also increasing one cent, the East Coast’s average price is now $3.95 per gallon and the Rocky Mountain price is now $3.95. At $4.03 per gallon the West Coast has the highest average price per gallon of diesel fuel, a one cent increase from last week.