Established in 1977, Oil Price Information Service maintains a database of wholesale petroleum prices of the United States and receives more than 70,000 rack prices daily. Its database helps to map retail prices and receive daily gasoline and diesel prices for over 125,000 retail outlets in the U.S. and Canada. The company s prices are used by the American Automobile Association, Microsoft Corporation, Garmin, MapQuest, and other Web sites and mapping companies. Oil Price Information Service is comprised of nearly 50 information specialists. Its client list includes approximately 200 oil companies, distributors, traders, and government and commercial buyers of petroleum products. Oil Price Information Service also offers access to more than 10,000 biodiesel prices at more than 200 rack locations daily.