Considering your car's case, Pros:
Good fuel efficiency, engine oil grade is recommended and most suited as per manual, etc.
Cons:
Excessive Oil consumption / reduction issues may start, combined with smoke from the exhaust.
IMO, stick with ZIC 10w-40 fully synthetic, if it's working fine.
YES.
The issue is not with ZIC 10w-40. Issues seem to lie somewhere else.