According to the Gasoline and Diesel Fuel Update from the EIA the national average diesel fuel price declined two cents from last week to $3.89 per gallon. The West Coast’s average price also declined by two cents, but the region has the highest average cost in the nation at $4.05 per gallon. Both the East Coast and Midwest’s average diesel fuel prices decreased by two cents to $3.96 per gallon and $3.84 per gallon respectively. Declining by one cent the Rocky Mountain’s average price per gallon of diesel fuel is not at $3.90. The region with the lowest average diesel fuel price in the nation is the Gulf Coast at $3.79 per gallon, one penny lower than last week.