to all brothers in this forum
Radiator coolant is not a serious parameter on which you need think tanks to give a deep thought. Some of my brothers wrote very right in above threads that its only an anti-freezing/anti-boiling agent. i have 4 cars Alhamdullilah 2.0D saloon, liana, japanese alto and a pakistani alto. i m using that so called japanese brand coolant osaka which is about 150rs per bottle, single bottle mixed with AC drain water is good enough for an alto to maintain its cooling system in all seasons, when one talks about brands, its always expensive, they only cost you for there names. my pakistani alto is 70,000 kms driven totally on CNG (twice or thrice a week on petrol, only 2-3 kms) AC always on and it has never created any temperature issues, radiator is as clean as new since 5 years.
no need to spend big money on an option which can be easily replaced by a cheaper one which also fulfills your requirement. if a 150rs bottle can give you 1 year trouble free ride what else you want