I don't have any stuck bolts or nuts at the moment, and I have used Kroil for years. I'm trying to find out if such a method is valid or just some shade tree mechanic fable. Unless I imagined it, the method involves holding a moderate amount of force on a wrench (any kind of wrench), as long as overnight, to loosen the nut or bolt (any kinds of nuts or bolts). I remember thinking it was b.s. when I read it. In theory, it would create some amount of torque in the stud or nut.

__________________
2009 E320 Bluetec 117,000
1995 E300D 306,000 Sold
1996 Ford Taurus LX 130,000 Sold
1985 300TD Still 225,000 Sold
2016 Ford Fusion 24,900