The U.S. average retail price of regular gasoline increased seven cents this week to $3.49 per gallon, 21 cents per gallon lower than last year at this time. The average price decreased in the Rocky Mountain region to $3.49 per gallon, down two cents from last week, while prices increased in all other regions. This is the 14th consecutive week that the Rocky Mountain price has decreased, dropping 31 cents since April 16, 2012. The Gulf Coast saw the largest increase, with the price up nine cents to $3.29 per gallon. On the East Coast, the average gasoline price increased eight cents to $3.49 per gallon. In the Midwest, the average gasoline price is $3.48 per gallon, an increase of six cents from last week. Rounding out the regions, the West Coast price increased four cents to $3.72 per gallon.

The national average diesel fuel price increased nine cents to $3.78 per gallon, 17 cents per gallon lower than last year at this time. Prices increased in all regions of the Nation, with the largest increase on the West Coast, where the average price increased ten cents to $3.90 per gallon. Prices in the East Coast, Midwest, and Gulf Coast regions all increased nine cents, to $3.83 per gallon, $3.75 per gallon, and $3.71 per gallon, respectively. For the first time since February 13, 2012, the Rocky Mountain price is the lowest in the Nation, increasing three cents to $3.70 per gallon.