Ever since I've learned how to drive, my uncle would always remind us here @ home to use Distilled water to fill in our radiators. He said Tap water, w/c contains high levels of Chlorine, would damage the radiator, especially if used everyday. He also advised not to use Mineral water, as it contains many elements & could erode the radiator. Even the water that you weren't able to consume from your bottle shouldn't be poured in because traces of protein residues & acid would seep in ,causing damage.
No wonder my neighbor here , who owns a jeep,would always complain of having his radiator flushed constantly due to clogs...his water source? From the nearby murky creek!
