Bangchak pump prices on 19 Sep 2026: B7 diesel 40.69 baht/litre, B20 35.69 baht (up 0.85 baht from yesterday), Gasohol 95 39.94 baht, Gasohol 91 39.57 baht, E20 34.94 baht. Prices exclude the Bangkok local land tax and the article says tomorrow's prices take effect at 05:00. Check your own station's price before budgeting fuel for delivery and transport runs, and consider whether B20 is a cheaper option for your fleet or generators.