Average U.S. retail pump prices for diesel and gasoline moved in opposite directions this week, according to data tracked by the Energy Information Administration (EIA), though the changes in the case of both fuels amounted to less than a penny per gallon.

Nationally, diesel dropped 9/10ths of a penny to $3.925 per gallon, the agency reported, which is 4.5 cents higher compared to the same week in 2013.

Diesel prices declined in every region of the country except out on the West Coast, where prices increased 2/10ths of a penny to $4.027 per gallon when California’s prices are included and jumped 6/10ths of a penny to $3.929 per gallon with California excluded.

EIA noted that diesel prices eclipsed the $4 per gallon mark in five regions this week: the West Coast when including California ($4.027), California ($4.109), the Central Atlantic ($4.127), New England ($4.130), and the East Coast ($4.127).

Gasoline prices increased nationally by 9/10ths of a penny to $3.674 per gallon, the agency said; which is 2.9 cents per gallon higher compared to the same week in 2013.

Four regions of the country recorded gasoline price increases this week: The West Coast  including California (up 1.1 cents to $3.778 per gallon); the Midwest (up 4 cents to $3.651); the Central Atlantic (up 7/10ths of a penny to $3.711); and New England (up 1/10th of a penny to $3.721).