As of Sept. 28, 2015, the average price of gasoline in Alabama was $1.97 per gallon for regular unleaded and $2.35 per gallon for diesel. In September 2014, the average price per gallon was $3.13 for regular and $3.62 for diesel.
The American Automobile Association's Daily Fuel Gauge Report updates once a day with the average prices for regular unleaded, mid-grade, premium and diesel gas prices both for the United States as a whole and for individual states. The site allows users to compare average gas prices from one day ago, one week ago, one month ago and one year ago. The Daily Fuel Gauge Report lists the U.S. Department of Energy and the U.S. Department of Transportation's Federal Highway Administration as its resources.