Sources

This page lists the core public sources used in the current build and explains which page uses which source basis.

U.S. page sources

EIA weekly U.S. field production of crude oil
EIA Today in Energy daily prices page for WTI and Brent benchmark context

Global and countries page sources

EIA FAQ page for top oil producers and world total oil production basis
EIA Today in Energy daily prices page for WTI and Brent benchmark context

Why not use the same source everywhere?

Because the most practical official public source for U.S. weekly updates is different from the most practical official public source for comparable country rankings. The site discloses those differences rather than pretending they are identical.