Bangchak's posted prices for 7 Sep 2026: diesel 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 Bangkok's local land tax and take effect at 05:00 the next day. If your business runs trucks, delivery vans or generators, check your fuel cost assumptions and any fuel surcharges in customer quotes now. Confirm the price at your own station, since the article notes it is a reference only.