[Mike S]

I was reading up on the mixtures further and discovered that apparently you must only used distilled water if you plan to make your own mixture.

Is this true?

[dvldoc]

With the all nickel plated fitting that we use it is not necessarily however I do not use tap water. Regular filtered drinking water is just fine to use in the system. I have not used distilled in 4 years.

[Mike S]

Hi dvldoc,

Great, I'm relieved to hear that. Methanol was hard enough to get a hold of, don't want to water to be another mission as well.

Thank you!

[ILuvDetailing]

Will mineral water work as well? Any chance of clogging up the system using tap water?

[dvldoc]

Store bought filtered water works fine. Some location do have hard water so you will want to avoid that. If you have a problem with stains in your bathroom, toilets or clogged shower nozzles it's a good chance you have hard water and it should be avoided.

[prandyulo]

I learned the hard way. After more than a year using regular tap water in the Philippines (Metro Manila) I noticed the past few weeks the mixture tank was hardly depleted. I opened up the nozzles and true enough it was clogged with hardened brown residue. A quick clean up and it's good to go once again. I did use a strainer for the tap when I mixed with methanol. But hey, maybe if I can afford to clean up the nozzles every 6 months it should not be a problem.

[dvldoc]

Had the same problem in Guam, with hard water. Filtered water is fine to use but not the tap. Distilled is the best but I have had no problems with bottled water to date.

[Dust]

I wanted to add a caveat. What you put in your engine will find it's way to your oil. Here is a link to a discussion about using non-distilled water, and it's effects on oil.

Rotella 5/40 analysis after 10,000 miles - Diesel Place