Bangchak pump prices today: high-speed diesel 38.39 baht/litre, B20 biodiesel 33.39 baht, gasohol 95 37.69 baht, gasohol 91 37.32 baht, E20 32.69 baht. Prices exclude Bangkok's local land tax and take effect tomorrow from 05:00, so check the station before refuelling. For fleets and delivery vehicles, the gap between diesel and B20 is about 5 baht per litre, so confirm which blend your vehicles accept. Figures are from one operator and may differ elsewhere.