To TS,

Go to UTP if you get Petronas scholars. Or if you able to secure JPA or MARA scholarship. Else, it will be a big amount to study here.

UTM Mechanical? No comment. Don't have friend there.
I have friends in UM and USM mechanical, visited their lab facilities and everything.
I would say UTP stands out better in this. More comfortable environment to study as well.

UTP is pretty new as a university, of course the research capability (amount) lose the UM/UTM. Better visit those campus yourself, to have a look at the study environment, etc.

To me, UTP is pretty good in term of teaching material and facilities. Lecturers? Well every universities have their "great" lecturer and "bad" lecturers. Not all are as good as azarimy

Job opportunities? Well with 32 weeks internship you gonna go through in UTP, I believe many companies will want you after your graduation.
If you targetting oil n gas sector, studying in UTP does give you priority over other universities student (it still depend on yourself, how you bring yourself a student).

Good luck in choosing a suitable uni for yourself to further study in mechanical engineering.

I'm from UTP, Mechanical Engineering, final semester