NC Bill Posted November 20, 2011 Report Share Posted November 20, 2011 Is it normal for the coolant level to reduce in the tank? I'm probably down an inch in 50 hours flying. I see that AutoZone sells a 1 gal. 50/50 Pre-Diluted Dex-Cool antifreeze and coolant for use in GM cars and trucks. Should I just add this to bring the level back up to middle point? Link to comment Share on other sites More sharing options...
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