If your car's engine is working absolutely fine on 5w-30 and you are not observing any issues, like oil consumption in particular, I would sincerely suggest continue using it.
At max., Just change brand, like Shell, Total, Kixx, Caltex / Havoline, etc. But grade should be same i.e. 5w-30.
Prefer fully synthetic. Ensure oil is
% authentic. Change oil + oil filter after every 5,000 Kms, and you'll be good to go.
I hope it helps. Thank you.