3. Automobiles
If you want to make sure your engine and battery in your car last a long time, it is a good idea to use only distilled water. Tap water when used as a coolant introduces materials that can corrode your engine and may require you to replace it much sooner.
The minerals that are found in tap water can build up in the engine and can interfere with proper functioning. Always distill water when using it as a coolant, and if you are on the road, use mineral water. In addition to the minerals, chlorine in tap water can also encourage scale formation and can speed up decay.
The same should be kept in mind when recharging lead batteries in cars. Some experts argue that specially designed coolant is the best thing to use for your engine, but without a doubt, if you are going to use any mixture with water, distilled water is the best choice.