Bangchak's posted prices for 19 Oct 2026: B20 diesel 37.19 baht/litre (unchanged), High Diesel S 42.94, gasohol 95 41.44, gasohol 91 41.07, E20 35.69, E85 31.63. Prices exclude the Bangkok local-area tax and are reference only, so check at your station. Tomorrow's prices take effect at 05:00. If your fleet or delivery costs run on diesel, budget against these figures and recheck before fuelling.