ZIC, Total Quartz 9000 Future Series, Shell Helix Ultra series, Caltex Chevron, Mobil 1, Liqui Moly, Amsoil, Valvoline, Castrol, etc. and the list goes On...
All are good as long as you can afford, still, if talking for best for bucks; Total Quartz 9000 Future Series IMHO, or any oil brand, which is fully synthetic and meets latest API and ILSAC criteria.
I would suggest to change the brand.
Please have a look at your car's owners / users manual keenly. For sure, recommended engine oil grades for your engine will be there. Start from the thinnest, and then stick with it (unless / until you face any issues).
Btw, mind sharing the pic from the manual where recommended engine oil grades for your engine have been written? (May be, on the basis of that, members can guide you better)
Too thick, avoid it.
I am not sure, since I haven't looked at Ciaz owners / users manual, however, I believe, starting oil grade would be 5w-30 (if not 0w-20 or 5w-20). If this is the case, stick with 5w-30, and go for Total Quartz 9000 Future Series only. But do make sure that warranty is voided or not? after changing engine oil grade / brand, etc.
(Before switching to new oil grade and brand, I would suggest to go for engine flush (not to remove any sludge / gunk, it won't be there IN SHA ALLAH), but to remove any of the remnants of previous engine oil grade / brand)
I hope, it helps. Thank you.