Diesel prices remained steady for the week of October 21, 2013 according to the data from the Gasoline and Diesel Fuel Update released by the EIA. The national average diesel fuel price was unchanged from last week at $3.89 per gallon, and increasing less than a penny the East Coast, Gulf Coast and West Coast prices also remained unchanged. The prices held steady at $3.90 per gallon on the East Coast, $3.80 per gallon on the Gulf Coast and $4.05 per gallon on the West Coast. The average price in the Rocky Mountain region decreased by one cent from last week to $3.88 per gallon. Decreasing less than a penny the average price per gallon of diesel fuel in the Midwest remained at $3.85 per gallon.