I guess until the day we can drill oil/gas from Mars or Venus. Then we will know theory for the biogenic petroleum oil is not correct.
So I really wouldn't get my hopes up for extraterrestrial oil at all, sad as that may be. On the other hand, minerals and metals most certainly exist outside of Earth, so...?
If there is petroleum oil in Mars or Venus. It make the abiogenic petroleum oil more possible be universal.
I meant if there is petroleum oil in Mars or Venus, it makes the abiogenic petroleum oil more possible be universal resources.