This site explains the components of gasoline and diesel prices using dated public data. It is for readers who want to understand why prices differ, rather than simply find the nearest station.
We distinguish reported values, calculated values and unavailable inputs. Every price page links to its source and describes its method. This project is independent of the agencies whose data it cites.
For a suspected error, first compare the date, grade and unit with the linked original source. The methodology page explains how a disagreement can arise. Tax records include verification notes so unresolved assumptions are visible.