Bangchak's prices for 4 Oct 2026: High Diesel S 42.19 baht/litre, B20 37.19 baht (up 0.75 baht from the previous day), Gasohol 95 40.69 baht, Gasohol 91 40.32 baht, E20 35.69 baht. Prices exclude the Bangkok local land tax and take effect at 05:00 the next day. If your fleet or delivery costs run on diesel, update your cost estimates and quotes now, and confirm prices at your local station.