The U.S. average retail pump prices for diesel and gasoline moved in opposite direction this week, according to data tracked by the Energy Information Administration, with diesel increasing 3.1 cents per gallon while gasoline prices declined ever-so-slightly by 1/10th of a penny per gallon.

The agency reported that the U.S. average retail pump price for diesel reached $3.904 per gallon this week – 2.3 cents per gallon cheaper compared to the same week in 2013 – with every region in the country reporting an increase in pump prices.

The biggest one-week spikes in diesel prices occurred in the Central Atlantic region up 8.4 cents to $4.144 per gallon) and New England (up 5.3 cents to $4.171), EIA noted, which were also two of three areas in the nation sporting prices over the $4 per gallon mark, with California ($4.068 per gallon) sewing up the third slot.

By contrast, U.S. average retail pump prices for gasoline declined though only by 1/10th of a penny to $3.295 per gallon, which is 6.2 cents per gallon cheaper when compared to the same week in 2013, EIA reported.

Gasoline prices declined in all regions of the country except for the Midwest, where prices increase 1.9 cents to $3.219 per gallon. New England witnessed the biggest one-week decline – 2.6 cents to $3.464 per gallon – while the Gulf Coast remains home to the cheapest gasoline in the nation this week, declining by 1.1 cents to $3.092 per gallon, the agency said.