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      07-19-2019, 06:41 PM   #5
John_01
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Drives: E90 325i, E82 135i
Join Date: Mar 2009
Location: Sydney, Australia

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A mechanic (who is also an amateur racer) told me that pure water isn't a great idea because there is no lubrication for the water pump. However you can get better thermal trasfer by using higher % of water in the coolant mix.
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