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rscurtis 06-13-2014 08:08 PM
Quote:
Originally Posted by funola (Post 3343302)
Wouldn't leaving the cap loose allow air (oxygen) to enter? Oxygen promotes oxidation (rust). Isn't that not good for cast iron engines?
No on two counts. First, even with the cap tight, there is air in the system. Second, the "N" in NPG stands for "non aqueous", i.e., there is no water in it. No corrosion, cavitation, or electrolysis.


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