mnm99
Well-Known Member
Does anyone know if this Prestone can be used in a closed cooling engine? Just for the Raw water side as a winterizer? Just manifolds and coolers, not in the engine? It does say not for engines, but it's not going IN the engine.
https://prestone.com/product/prestone-rv-waterline-antifreeze/
https://prestone.com/product/prestone-rv-waterline-antifreeze/