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      03-27-2013, 05:10 AM   #11
GaryS
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Drives: 2009 135i 6MT
Join Date: Feb 2010
Location: Maryland

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2009 135i  [6.50]
Quote:
Originally Posted by BiscottiGelato View Post
when people say coolant, do you mean anti-freeze?

the water wetter article says even A/C in the summer can blow freezing air to the cooling system causing water wetter to expand and kill my cooling system? that sounds like a track only car solution then... not even okay for a summer/winter coolant mix change.
So as I read the article, you should use at least 20% coolant (also called antifreeze).
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