GAS80 compares Costco regular-gas prices along the San Francisco–Reno I‑80 corridor, including the two South San Francisco departure-area Costcos. It highlights the best practical California corridor stop first, generally limiting detours to about 10 miles, and shows the best Nevada price separately because Nevada fuel pricing is typically lower. The three leading California corridor contenders are rechecked about every 3 hours; the full set of stations is refreshed about every 6 hours. Prices can still change at the pump, so each station shows when its price was last updated.