Bangchak pump prices on 5 Oct (2026): high-speed diesel 42.19 baht/litre, B20 37.19 (up 0.75 from yesterday), gasohol 95 40.69, gasohol 91 40.32, E20 35.69. Prices exclude the Bangkok local-area tax and take effect at 05.00 the next day. For fleet or delivery costs, budget with the B20 vs high-speed diesel gap of about 5 baht per litre, and check prices at your own station before filling.