There were a few coolants that I have tested/used in my Perodua Viva. Since not much review when I first try to search on coolants thus I make this review for others who might still blur what to use.
All this while I have tried Water
Wetter from Redline®, coolant from UMW
(said to be same Toyota® coolant- actually it is not. More about that later.) and the coolant for Toyota® itself.