Diesel declined for the third consecutive week, slipping 1.4 cents to $3.934 a gallon, the Department of Energy reported May 19.
The ninth decline in the past 12 weeks left trucking’s main fuel 4.4 cents higher than the same week last year.
Gasoline, meanwhile, dipped 0.3 cent to $3.665 a gallon, also the third straight decline, DOE said after its weekly survey of filling stations.
Gas is 0.8 cent below its level of a year ago and 47.1 cents higher than its two-year low $3.194 per-gallon in mid-November.
Despite the recent downturns, diesel has held over $3.90 per gallon since late January.
Gas gained 42.1 cents in 12 straight increases before sliding 4.8 cents in the past three weeks.
Crude oil rose 59 cents May 19 to finish at a four-week high $102.61 a barrel on the New York Mercantile Exchange as supplies declined at Cushing, Oklahoma, a primary oil delivery point, Bloomberg News reported.
Each week, DOE surveys about 400 diesel filling stations and 800 gasoline stations to compile national average prices.