Bangchak's posted pump prices for 18 Oct 2026: diesel B20 37.19 baht/litre (unchanged), diesel B7 42.94 baht, gasohol 95 41.44 baht, gasohol 91 41.07 baht, E20 35.69 baht. Prices exclude the Bangkok local land tax. Tomorrow's prices take effect at 05:00. Check the price at your own station, since these are reference figures. For fleets and delivery vehicles, use the B20 vs B7 gap (about 5.75 baht/litre) when choosing which diesel to buy.