Yep and if its a 3650 it may call for more in your owner's manual or an updated instruction sheet you find somewhere. Originally the 3650s called for 3.8 but its been reduced to the 3.25 meow. When I do a drain/fill I just pop the shifter and fill 3 bottles and guesstimate a quarter bottle after that and button it back up.
2000 Mustang GT Steeda #0048
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.