Bangchak's reference prices for 4 Aug 2026: gasohol 95 at 36.69 baht/litre, gasohol 91 at 36.32, diesel B7 at 36.69, and B20 at 31.69 (up 0.90 baht from the previous day). Prices exclude the Bangkok local-area tax and take effect at 05:00 the next day. Fleet and delivery operators should check the B20 vs B7 gap when budgeting fuel, and confirm the pump price at their own station before filling.