U.S. diesel prices inched down as of Sept. 16, following an 8.5 cent jump in the weeks before that brought the average to its highest level since April 1, according to the U.S. Energy Information Administration.
The national average price is $3.974, down 0.2 percent or 0.7 cents from last week. Prices are up 1.4 percent or 6 cents from January. However, prices remain down 3.9 percent year-over-year.
Prices dipped in most U.S. regions this week. The largest decrease came from the West Coast less California region, which saw prices drop an average of 1.3 cents to $4.032 per gallon. California and the Rocky Mountain region saw the only increases in price this week. California edged up 0.3 cent to $4.228; the Rocky Mountain region rose 0.7 cent to $3.941. The average prices in the Lower Atlantic, Midwest, Gulf Coast, and Rocky Mountain regions remain under the $4 per gallon mark.