National Diesel prices fell below the $4 mark, slipping 4.8 cents in the week ending May 21st. The national average fell to $3.956, after dropping for five straight weeks. Year over year, the national average is 4.1 cents lower than it was at the period last year. However, prices are up 17.3 cents from where they were at the beginning of the year.
Prices fell in all regions, with the East Coast’s New England region, Central Atlantic, and the West Coast remaining above $4.