There was a member here named Ray H who had an Asian car. He flushed out whatever coolant came with the car and used Super Tech mixed with distilled water. He would post about the car still going strong in several threads here in the coolant forum. I want to say he ran the stuff for 4-5 years before changing it out and using Super Tech again.
In fact, I think there was also another member here who did the same thing in a different Asian car but I cannot remember the user's name.
There really is no issue using an aftermarket coolant in an Asian car, European car, or American car. I never use Peak products as they don't list all the ingredients used (NJTSRN QT-1) so I only recommend Prestone AMAM or blue bottle Super Tech as they are not ashamed to list the ingredients since both are made by Honeywell.
I cannot remember the model and engine, but Mazda made an engine that Ford used and Ford spec'd Ford Premium Gold (G-05) coolant for it which Mazda supposedly didn't like. G-05 is S-HOAT (silicates, no phosphates) and SOME Asian coolants are P-HOAT (phosphates, no silicates). Both do the same thing which is offer quick protection against cavitation to the water pump impeller. The Europeans have a lot of hard water which phosphates don't like and can form scale. Though both offer quick protection, they are also both abrasive and will take their toll on water pump seals.
It is a BLESSING auto companies are going to OAT coolants instead of sticking with P-OAT or S-OAT. Phosphates and silicates have been replaced with better additives.
