Questions & Answers about Kwalin mai nauyi ne.
No. This is a different mai.
In Hausa, mai can also be a word meaning having, with, or characterized by. So in mai nauyi, it does not mean oil. It is part of a descriptive expression.
Literally, mai nauyi means something like having weight or one with heaviness. In natural English, that is just heavy.
This is a very common Hausa pattern:
mai + noun → an adjective-like meaning
So:
mai nauyi = heavy
nauyi by itself = weight / heaviness