The U.S. average retail price of diesel dropped 1.5 cents to $3.136 a gallon, the Department of Energy reported. Crude oil plunged to $53 a barrel and flirted with a bear market as the tensions surrounding international trade mounted.
Diesel costs 14.9 cents more than it did a year ago when it was $2.987, DOE said June 3.
Regional diesel prices fell everywhere across the nation.
The regional average that fell the most, 2.5 cents, was in California, to $4.109 a gallon.