Bangchak's posted pump prices for 20 Sep 2026: B20 diesel 35.69 baht/litre (up 0.85 baht from the previous day), B7 40.69, gasohol 91 39.57, gasohol 95 39.94, E20 34.94. Prices exclude Bangkok's local land-and-building tax, and tomorrow's prices take effect at 05:00. Check the price at your own station before budgeting fuel costs for delivery vehicles or generators, and note that B20 is the cheapest diesel option listed.