The national average diesel fuel price decreased less than a penny to remain at $3.88 per gallon for the week of December 9, 2013 according to the Gasoline and Diesel Fuel Update released by the EIA. All regions of the nation had a one cent decrease from last week except the East Coast where the average diesel fuel price increased less than one cent, remaining at $3.91 per gallon. The Gulf Coast currently has the lowest average diesel fuel price of $3.77 per gallon. The average price per gallon of diesel fuel in the Rocky Mountain region is now at $3.85 per gallon after a one cent decrease. The Midwest’s average price per gallon of diesel fuel went down to $3.87 per gallon, and the West Coast price is now at $3.99 per gallon.