Seoul's forecourts (SK Energy, GS Caltex, S-OIL and Hyundai Oilbank) spread along the Olympic-daero, the Naebu ring and every gu, though land prices keep stations sparse in the core. Opinet price comparison is a national habit, and self-service saves money. EV charging is abundant, from apartment garages to Han River park lots.
Only 36 of the 663 stations mapped in Seoul say whether they sell diesel. The rest probably do; nobody has recorded it. See Seoul on the map →
Plan your stop
In Seoul the filters that actually narrow things down are diesel (36), LPG (17), CNG (3) and CCS charging (6). Travelling at night, switch on "open now": 46 places are tagged 24/7. When you arrive, a quick confirmation keeps the map right for the next driver in Seoul.