In addition to the decline in premium gasoline production costs, the change in the price relationship between premium and regular gasoline likely reflects factors such as vehicle characteristics and consumer preferences. After the use of premium gasoline peaked in the late 1980s, its consumption has fallen by more than 50 percent. In 1989, premium accounted for slightly more than a quarter of all gasoline sold in the United States; since 2006, that share has been between 8.5 and 9.5 percent.
Gasoline and diesel fuel prices fall for a 7th week
The U.S. average retail price of regular gasoline decreased seven cents from the previous week to $3.54 per gallon as of April 15, 2013, down 38 cents from last year at this time. Prices were lower in all regions of the nation, with the largest decrease in the Midwest, where the price fell 10 cents to $3.46 per gallon. The Gulf Coast price dropped seven cents to $3.36 per gallon, and the East Coast price is $3.53 per gallon, five cents lower than last week. The West Coast price declined four cents to $3.89 per gallon, but remains the highest in the nation. Rounding out the regions, the Rocky Mountain price is two cents lower than last week at $3.51 per gallon.
The national average diesel fuel price decreased four cents to $3.94 per gallon, 19 cents lower than last year at this time. Prices decreased in all regions of the nation, with the largest decrease on the West Coast, where the price decreased five cents to $4.07 per gallon. The Gulf Coast price dropped four cents to $3.85 per gallon. The East Coast and Midwest prices are both three cents lower than last week, at $3.98 per gallon and $3.92 per gallon, respectively. Rounding out the regions, the Rocky Mountain price fell two cents to $3.88 per gallon.