Hi and welcome to SS thread:)
Tbh, it depends on you and your driving style. Zic XQ is good and so is Caltex Fully synthetic 5-40. I prefer using Liqui Moly( Yes, overkill for a Suzuki) but I drive a lot- Approx 90km a day in stop and go traffic etc. and I use Liqui Moly synthol 5w40. I changed this oil at 10,000km( not recommended ).
Some are satisfied by SGO and some prefer 20-50... Do some research on Oil threads and make your mind!
Go for Zic XQ- do some research online to find nearest Authorized ZIC dealers and read about Engine Oils on Pakwheels as well.
Do get oil and oil filter changed from dealership- Bring your own oil and in case of warranty issue, it's just rumors about warranty being void bla bla. Get the pricy Oil filter, it's bigger and designed for the M13-A engine and costs a whopping 950 rupees hehe.
Hope it helped ya:P
Here's a nice thread to read and gather some info as well!
https://www.pakwheels.com/forums/oil-fuel-fluids-filters/221706-zic-oils-petrol-cars-covered-mileage#post4046376
Strange no one couldn't even be bothered to reply to this guy... -.- No offense intended, I am sure you've got jobs to do and I am kinda free 24/7:)
MashAllah, May Allah SWT keep it that way:)