The national average diesel fuel price declined two cents from last week to $3.89 per gallon, according to the Gasoline and Diesel Fuel Update released by the EIA January 13, 2014. Dropping four cents, the average diesel fuel price on the West Coast is now $3.99 per gallon. The Midwest price declined three cents from last week to average $3.86 per gallon. The average price per gallon of diesel fuel in both the Rocky Mountains and Gulf Coast decreased two cents to $3.88 per gallon and $3.78 per gallon respectively. The East Coast had the smallest decrease, declining only a penny to make the new average diesel fuel price $3.94 per gallon.