The national average diesel fuel price decreased one cent from last week to $3.89 per gallon according to the EIA Gasoline and Diesel Fuel Update released October 17, 2013. All regions of the nation had a price decrease except the West COast where the average price remained the same as last week, $4.05 per gallon. The Rocky Mountain price dropped three cents from last week to $3.89 per gallon. In the Midwest the average price per gallon of diesel fuel declined two cents to $3.85 per gallon. On both the East Coast and Gulf Coast the average price decreased by one cent to $3.90 per gallon and $3.80 per gallon, respectively.