Originally Posted By: Fordiesel69
When ford fills vehicles, is it distilled or deionized water?
Also which is better, I have both avail to me and they are close in price.
For vehicle use, either is fine. Which is better is simply a moot point, since the addition of antifreeze in addition to the molecules of metal and other stuff released from the surfaces of the engine, hoses, etc. will immediately cancel out the minute differences between the two.
Having said that, there are differences in the quality of these products simply due to the equipment they are processed in. With an EC meter I have compared store bought distilled water to DI water from our greenhouse Culligan DI columns and the DI water is SLIGHTLY better. But, as the DI columns begin to be "spent", the DI water quality quickly degrades.
So, the bottled distilled water "should" have good quality control. What is your DI source and is it reliable?
Again, it's a moot point otherwise, IMO.