Data Sources & Disclaimer

Where the numbers come from

All prices on oyll.com are published by the U.S. Energy Information Administration (EIA). EIA data are public and free to use. We retrieve them automatically from EIA’s public data pages:

• Weekly retail gasoline prices (regular, midgrade, premium) by area – EIA Form EIA-878, Motor Gasoline Price Survey: regular, midgrade, premium.
• Weekly retail on-highway diesel prices by area – Form EIA-888, On-Highway Diesel Fuel Price Survey: diesel.
• Weekly price history for charts and year-ago comparisons, from EIA’s series history pages (for example U.S. regular gasoline).
• Daily crude oil spot prices: WTI, Cushing, Oklahoma (RWTC) and Brent, Europe (RBRTE).
• Definitions and methodology, including which states are in each PADD region: EIA definitions, sources and notes.

Coverage and limitations

• EIA publishes weekly gasoline prices for the U.S., the five PADD regions, the three East Coast subregions, the West Coast excluding California, nine states and ten cities. For the other 41 states and DC, our state pages show the regional average and label it as such.
• Weekly diesel prices are published for the U.S., the PADD regions and subregions, the West Coast excluding California, and California.
• Weekly prices are Monday 8:00 a.m. averages; daily spot prices are posted by EIA with a delay of a day or more.
• Averages are not the price at any particular station.
• Week-over-week, year-over-year, 52-week ranges and calculator results are calculated by oyll.com from EIA’s published numbers.

Disclaimer

Information on this site is provided for general information only, as-is, without warranty of any kind. Although we retrieve data directly from EIA, errors or delays in collection, publication or processing can occur. Do not rely on this site for trading, financial or business decisions; check the original EIA publication. oyll.com is independent and is not affiliated with, endorsed by or sponsored by the U.S. Energy Information Administration or the U.S. Department of Energy.

Image credits

All photos on oyll.com are in the public domain or released under CC0, so they may be used freely, including commercially, without attribution. We credit the photographers anyway and host every image ourselves.

• Home page: Empty fuel station at night, with two pumps under a lit canopy. Photo by Markus Spiske, Unsplash, via Wikimedia Commons – source, CC0 1.0 (public domain dedication) (cropped; a tiny pump logo and a faint background sign were retouched out).
• Gas prices by state: Aerial view of an interstate highway winding through wooded hills outside Pittsburgh, Pennsylvania. Photo by Carol M. Highsmith, Carol M. Highsmith Archive, Library of Congress – source, Public domain.
• Oil price today: Offshore oil production platform lit up at dusk in the Gulf of Mexico. Photo by GuavaTrain, Wikimedia Commons – source, CC0 1.0 (public domain dedication).
• Fuel cost calculator: Empty interstate highway stretching toward a mesa in the Utah desert. Photo by Carol M. Highsmith, Carol M. Highsmith Archive, Library of Congress – source, Public domain.
• Guide: What's in a gallon / Guides index: Distillation towers and storage tanks at an oil refinery in Groves, Texas, near Port Arthur. Photo by Carol M. Highsmith, Carol M. Highsmith Archive, Library of Congress – source, Public domain.
• Guide: How to read EIA data: Gas pump in Indiana showing the price display and octane grade buttons. Photo by Tysto, Wikimedia Commons – source, Public domain.
• Guide: Diesel vs. gasoline: Tractor-trailer truck kicking up snow on a remote highway in Alaska. Photo by Bureau of Land Management Alaska, Wikimedia Commons (U.S. government work) – source, Public domain.
• Guide: Regular vs. premium: Fuel pump grade selector with E85, E30, E15, regular 87 and premium 93 buttons. Photo by 127driver, Wikimedia Commons – source, CC0 1.0 (public domain dedication).
• Guide: Fuel-saving tips: Cars on Interstate 15 at sunset near Baker, California, with the Soda Mountains behind. Photo by Carol M. Highsmith, Carol M. Highsmith Archive, Library of Congress – source, Public domain.
• New England (PADD 1A) state pages: Portland Head Lighthouse on the rocky coast of Cape Elizabeth, Maine, in New England. Photo by Carol M. Highsmith, Carol M. Highsmith Archive, Library of Congress – source, Public domain.
• Central Atlantic (PADD 1B) state pages: Farm fields and barns in the countryside of Lancaster, Pennsylvania. Photo by Carol M. Highsmith, Carol M. Highsmith Archive, Library of Congress – source, Public domain.
• Lower Atlantic (PADD 1C) state pages: Autumn foliage along the Blue Ridge Parkway in North Carolina. Photo by Carol M. Highsmith, Carol M. Highsmith Archive, Library of Congress – source, Public domain.
• Midwest (PADD 2) state pages: A field of ripe wheat under a blue sky in Kansas. Photo by Carol M. Highsmith, Carol M. Highsmith Archive, Library of Congress – source, Public domain.
• Gulf Coast (PADD 3) state pages: Aerial view of an oil refinery and storage tanks beside the Gulf of Mexico near Houston, Texas. Photo by Carol M. Highsmith, Carol M. Highsmith Archive, Library of Congress – source, Public domain.
• Rocky Mountain (PADD 4) state pages: Hairpin turn on the Million Dollar Highway in the San Juan Mountains of Colorado. Photo by Carol M. Highsmith, Carol M. Highsmith Archive, Library of Congress – source, Public domain.
• West Coast (PADD 5) state pages: Concrete arch bridge on the Pacific Coast Highway (State Route 1) in California. Photo by Carol M. Highsmith, Carol M. Highsmith Archive, Library of Congress – source, Public domain.