Seattle's forecourts, Shell, Chevron, 76, Arco and Costco (born here), line I-5, SR-99 and the 405 loop, with Washington prices among the highest outside California. EIA weekly data gives official coverage. EV charging is dense and growing, backed by cheap hydro electricity.
Only 16 of the 246 stations mapped in Seattle say whether they sell diesel. The rest probably do; nobody has recorded it. See Seattle on the map →
Plan your stop
In Seattle the filters that actually narrow things down are diesel (16), LPG (1) and CCS charging (1). Travelling at night, switch on "open now": 88 places are tagged 24/7. When you arrive, a quick confirmation keeps the map right for the next driver in Seattle.