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Inside Practical Sailor Blog
by By Darrell Nicholson with Drew Frye on July 23, 2014
While the polar vortex was pummeling the northern states last winter (ahhh, remember those days?), Practical Sailor contributor Drew Frye was knee deep in glycol antifreeze and engine coolants. One of the test's most important findings was that how you use antifreeze is as important as what product you use. The only sure way to know how effective your antifreeze will be this winter is to measure the glycol as it comes out the other end of the plumbing. There are a couple ways to do this.