I would continue using whatever you have been using. If you have been using mineral oil, stick with it.
I would also use whichever viscosity is recommended by the manufacturer, and I would pick a name brand and stick with it. I was a Castrol guy, but 25 years in a company car, I quit doing it myself.
If you're buying on Lazada, buy from a reputable dealer.
B-Quik has a Lazada store where you pick the oil and buy the service online and get a coupon you can use at your local shop.
Saving money on oil is like saving money on paint. When you compare the cost of oil to the cost of the vehicle, and the time and effort involved, cheaping out makes little sense.