Bangchak pump prices on 10 Aug 2026: diesel B7 36.69 baht/litre, diesel B20 31.69 baht (unchanged), high-diesel S 36.69, gasohol 95 35.99, gasohol 91 35.62, E20 30.99. Prices exclude Bangkok local land tax and take effect from 05:00 the next day, so check your station. For fleets and delivery vehicles, the B20 vs B7 gap of about 5 baht/litre is worth checking against your engine and fuel policy.