Bangchak's reference prices for 17 Aug 2026: high-speed diesel 37.54 baht/litre, B20 diesel 32.54 baht (up 0.85 baht from the previous day), and gasohol 95 at 36.84 baht. Prices are before Bangkok's local tax and may differ at the pump. Tomorrow's prices take effect at 05:00. For fleets, delivery vehicles and generators, check the daily movement and update fuel cost assumptions in quotes.