Join Date: May 2015
Location: San Fransisco Bay Area
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Thanks for your response guys, I had to get back to home so ended up researching as due to weekend I didn't get any response before departure time.
So All the shops here were selling Peak coolant, some for specific car, some for "Universal", one of that universal was tagged "Green" and when I checked on web. It is mentioned not to mix that green with Pink. It may not seem bad initially but it is suggested that can lead to corrosion and eventually issues in radiator. There was no clear verdict on adding water as well.
So what I did next? When in doubt read the manual,
And the manual told me to only use G12+, G13 and if its an emergency use water (did not say distilled).
The problem with getting G12 was that it happened on Sunday with most of the shops closed(Its a small town, so not too many options either). Lucky for me, one mechanic shop was open, and to further add to that, he had Pentosin G12, (though he just got that bottle out after checking the color).
What he did was to add some amount of coolant and than add equal amount of distilled water. (do it when the engine is cold, or be cautious as there was steam when he opened the cork).