Bangchak pump prices on 7 Aug 2026: B20 diesel 31.69 baht/litre (unchanged), high-speed diesel S 36.69, gasohol 95 35.99, gasohol 91 35.62, E20 30.99, E85 26.93. Prices exclude the Bangkok local-area tax and take effect from 05:00 the next day. Check your own station before budgeting fuel costs for delivery vehicles or generators.