¡Look at (and READ) the pink stuff jug!
On the advice of a friend that used to be a product engineer for a major OE chemical supplier, I have started reading the jugs of RV anti-freeze that I have. The old ones were straight Propylene ...
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Any of the stuff tastes like Cr4p!. Always flush with water, then bleach/water solution, then water/baking soda solution or commercially available "water freshener" products.
