[Petronski]

...the Catholic position must demonstrate that that the “oral tradition” that is supposed to exist not only contains revelation from God that differs in content from what is found in the New Testament...

Nope.

[Mr Rogers]

If the oral tradition of Catholics results in doctrine (vs scripture), then Catholics need to show the oral tradition is as good as scripture for teaching, etc - IF they want others to take it seriously.

If we agree that scripture is God-breathed, but you claim oral tradition is also needed, then the ball is in your court - WHY do you believe that? What makes you think an unspecified oral tradition of uncertain origin is of comparable value to the God-breathed words of scripture?