Quote:
Originally Posted by leathermang
Distilled water is not necessary.....has no advantages in this case and of course costs more...
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It IS necessary in some case, but not with these engines I agree. The VW Wassserboxer needs it, mostly because the aluminum head tends to rot where it touches the steel piston sleeve. Some engines definitely benefit, and if you have very heavy water, it damn sure wouldn't hurt. BUT, with these engines, I think it is indeed overkill.