The U.S. average retail price of regular gasoline decreased one cent from the previous week to $2.32 per gallon on September 28, 2015, $1.03 per gallon lower than at the same time last year. Only the Midwest price increased, rising five cents to $2.33 per gallon. The West Coast price fell eight cents to $2.84 per gallon, followed by the Rocky Mountain price, which was down seven cents to $2.54 per gallon. The East Coast price decreased two cents to $2.19 per gallon, and the Gulf Coast price was down one cent to $2.02 per gallon.

The U.S. average price of diesel fuel decreased two cents from the prior week to $2.48 per gallon, down $1.28 per gallon from the same time last year. The Rocky Mountain price decreased four cents to $2.49 per gallon. The West Coast and Gulf Coast prices both fell two cents, to $2.69 per gallon and $2.32 per gallon, respectively. The East Coast and Midwest prices both decreased one cent, to $2.53 per gallon and $2.43 per gallon, respectively.