How many gallons of gas does it take to fill up a 15 passenger van?

The fuel capacity of a 15-passenger van typically ranges from about 25 to 40 gallons, depending on the make and model. To fill up the van, you would generally need to add fuel until the tank is full, which could require anywhere from 25 to 40 gallons. It's important to check the specific van's manual for the exact fuel tank capacity.