Stripped bolt on fuel tank!

I'm trying to drain my fuel tank but I can't seem to get the friggin' bolt off! I soak the bolt in some penetrating oil and it's still not moving. I'm going to let it soak overnight and try again in the am.

If this doesn't work, what other options do I have?

Regie
 
Once the bolt is stripped, you can try putting vise grips on there as tight as you can get them. I'm reluctant to say this, but you could use a brass punch (to avoid spark) and tap on the bolt with a hammer.Sometimes this will break the rust loose and/or allow the penetrating oil to seep in the threads.