"Rat- I guess you have never used it and have tested both. If you did, you would know distilled water has lots of bad stuff in it. If you like Silicates, Phosphates, salts, minerals, metals etc then use distilled by all means. I have a tester at home and so far distilled water is junk."
Don't you think you may have exaggerated a bit here?
Surely you don't want to incorrectly give people the idea that the distillation process carries these materials?
These materials could have been on the surface of the containers themselves before being filled...correct? Having nothing to do with distillation.
How clean do you think the interior cooling passages of your engines are? You should do a test for us. Fill your engine with some of your analyzed cleaner than clean water. Run your engine for a couple of hours. take out some of the water and analyze it again. Let us know the results. Heck I can save you some time, just rub your finger on some of the interior cast iron cooling surfaces of an engine, and let us know the ppm on your finger.
Distilled water is more than good enough for my engines. Heck I wonder what the PPM's are on the diesel fuel, or the air going in the intake, or the crankcase oil after a couple of hours?