User blog comment:Sharaku Jr./Son Goku VS Superman (Death Battle - Start From Scratch)/@comment-5038193-20190921045722

Thank you for putting out how Goku after the Time Chamber can use Super Saiyan without strain.

Just based on how casually he uses it in Super, he might be able to use Super Saiyan 2 without strain, and if its there, it would be VERY little. He really needs to workout the strain problem with Super Saiyan 3 given how powerful the form was once upon a time.