Our lecturers and professors always tell us students not to trust the Internet. We should listen to them.
Car owners should take every single article with a pinch of salt. Reading the first few articles parsed by Google, most forum posts tell users to mix the coolant with water. Some users even listen to those articles and dilute their coolant bottles with water up to a ratio of almost 70%.
What those users didn’t inform those readers are that SOME bottles of radiator coolant from manufacturers are already premixed with water. Imagine the damage you will cause the radiator if you over mix your coolant with water. You will lose cooling capabilities, you may cause some of the internal parts to rust prematurely and your coolant tank will need to be continuously topped up because water evaporates really quickly.
I don’t know about the rest of coolant brands, but I know that SPC’s bottle of radiator coolant is premixed with water. There is no need to add anymore water into the bottle. Just buy that $10.80 (get 5% rebate with POSB Everyday Card till end of nov2010) bottle of green premixed liquid and pour into your coolant tank. No frills, whatsoever.
Our elders may sometimes be right in some instances. I pity those poor people who listened to those forum posts and replies without doing their own research.