Weighted average based on sampling of approximately 900 retail outlets, 8:00AM Monday. The price represents self-service unless only full-service is available and includes all taxes. See (http://www.eia.doe.gov/oil_gas/petroleum/data_publications/wrgp/mogas_home_page.html) for further definitions. Premium Gasoline has an antiknock index (average of the research octane rating and the motor octane number) greater than 90. Octane requirements may vary by altitude. PADD V (Petroleum Administration for Defense District) represents the West Coast District and includes the following states: Alaska (North Slope and Other Mainland), Arizona, California, Hawaii, Nevada, Oregon, and Washington.
Release: Gasoline and Diesel Fuel Update
US. Energy Information Administration, PADD V (West Coast District) Premium All Formulations Gas Price [GASPRMWCW], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/GASPRMWCW, May 3, 2016.