The U.S. national average diesel price increased by a cool penny in the week ending Sept. 17, according to the Department of Energy. The slight increase brings the U.S.’ average price for a gallon of on-highway diesel to $3.268. Fuel prices have fluctuated between $3.20 and $3.30 since mid-May.
Prices increased in all regions during the most recent week except in the Rocky Mountain region, which saw a four-tenths of a cent decrease. The most significant increase seen during the week was in the Gulf Coast region, which jumped 1.7 cents.
California’s prices have been creeping closer to the $4