Can you prepoo and deep condition with the same oil?

I have relaxed 4a/b hair. I want to start incorporating more oils in my regimen (I seal with coconut oil nightly). As such, I am currently trying to use more oils in my prepoo and deep conditioner. Can I use EVOO (extra virgin olive oil) for both? Also, those of you relaxed ladies with long hair, what deep conditioner/concoctions do you use? Thanks. :)