Five gas stations in California reached $9.999 per gallon for diesel, hitting the maximum four-digit price limit that digital displays on standard pumps can show, according to data from GasBuddy.
California diesel prices averaged $7.76 per gallon as of September 9, representing a 55-cent increase in a single week and a $2.81 surge from the previous year following the closure of the Strait of Hormuz during the U.S. war in Iran.