Bangchak's posted pump prices for 5 Sep 2026: High Diesel S 39.14 baht/litre, B20 34.14 baht (up 0.75 baht from the previous day), Gasohol 95 38.29 baht, Gasohol 91 37.92 baht, E20 33.29 baht. Prices exclude the Bangkok local land tax and take effect from 05.00 the next morning. Fleet and delivery operators should re-check their fuel cost assumptions, and confirm the price at your own station before filling.