You didn't say what year you have but it should be 15mm.
15mm.
14mm
14mm
What size line wrench for a 2005 freestar
Its a 10mm Allen Key.
17 mm.
My 92 has a 9/16 size plug My 1997 LeSabre has a 15mm drain plug.
could be 15, 16, or 17mm wrenches
You can, or a wrench.You can, or a wrench.
13mm
Using a suitable 15mm wrench turn the drain plug counterclockwise.
It seems to me I use a 15 mm wrench to remove the engine oil drain plug.