How many quarts of oil for a 99 Ford Taurus?

According to the 1999 Ford Taurus Owner Guide :

With engine oil filter change :

The 3.0 liter " Vulcan " V6 engine takes ( 4.5 U.S. quarts )

The 3.0 liter DOHC " Duratec " V6 engine takes ( 5.5 U.S. quarts )