How much does it take to fill up the gas tank in a 2002 Buick regal?

The fuel tank capacity of a 2002 Buick Regal is approximately 16 gallons. To fill it up, the cost will depend on the current price of gasoline in your area. For example, if gas is $3.50 per gallon, it would take around $56 to fill the tank from empty. Prices can vary, so it's best to check local gas stations for current rates.