Not always accurate. In my opinion this should be true for new "green/regular" 50/50 premixed antifreeze. He gives mixed wand to wand readings. File 9 for that. Forgive yourself for trying for so long. I use the can for other things. The bottle is a quality product. I had to try to get my money back. so i screwed it up twice. I am ashamed! If your boss hates you trying to use this instead of a two dollar hydrometer, bad luck.
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