impact. And heat. Penetrating oil just makes fire and on stuff like that I don't use it. Looks pretty ugly. But I've had them come right out with an impact. The studs are usually screwed into the hub and they often come out when removing rusty nuts. So order all new nuts and stud because they'll probably all come out of the hubs with the nuts still attached.
I've had some bolts/nuts stuck so badly in the past that nothing would break them loose, not even my trusty 3/4" drive break over bar-which can put close to 1000 lb-ft of torque on things. But heat the nut up red hot, hit it with the impact and they usually come right off.
I've had some bolts/nuts stuck so badly in the past that nothing would break them loose, not even my trusty 3/4" drive break over bar-which can put close to 1000 lb-ft of torque on things. But heat the nut up red hot, hit it with the impact and they usually come right off.