Bangchak's posted prices for 9 October 2026: High Diesel S 42.94 baht/litre, B20 37.19 baht, Gasohol 95 41.44 baht, Gasohol 91 41.07 baht, Gasohol E20 35.69 baht. Prices exclude the Bangkok local land tax and take effect at 05:00 the next day. Check the pump price before budgeting fuel for delivery vehicles or generators, since the B20 gap versus High Diesel S is about 5.75 baht a litre.