What type of oil does a 2002 Mercury Sable need?

According to the 2002 Mercury Sable Owner Guide ( 5W-20 )

With engine oil filter change :

For the 3.0 litre " Vulcan " V6 , and its flex fuel version ( 4.5 U.S. quarts of 5W-20 engine oil )

For the 3.0 litre " Duratec " V6 ( 5.5 U.S. quarts of 5W-20 engine oil )