Thanks for all the help. I got that SOB. I only had WD40 so that's what I used and then left it for a couple of hours. I also used the following combination of stuff:
18" cheater bar (1/2" drive), reducer (1/2 to 3/8), short 3/8 extension, long 3/8 extension, one 3/8 swivel, and finally a 15mm...