What water to use when mixing antifreeze

Hi, There's no point putting de ionised, distilled or demineralised water into an engine because you just undo what was done to the 'special' water by putting it back in contact with minerals again. In the absence of virgins water (limited supply) use tap water the antifreeze will be enough to protect the engine.

Colin

Normal tap water. If you see what deionised water does to concrete,and most metals,you really wouldn't be putting it in your engine. It's more corrosive than acid in the same enviroment,as having had everything taken out of it,its in no sort of equilibrium when it comes to protons,neutrons,electrons,ions ,nuns,kittens,etc. It draws whatever it needs to get back into a state of equilibrium by leaching out what it needs from its surroundings. I knew a Chemistry professor many years ago who would only top up car batteries with tap water. Strange thing was his car batteries never seemed to get replaced....🤔

whats antifreeze???

What car?

I've always used tap water and I have been OK. Excpet on Blue Unipart coolant, but I put it down to the coolant itself. No decent coolant has given me issues; that is Ford 10 year coolant, Glytasyn G48, Prestone or OAT based coolants.

Always used tap water in the UK, but we did live in a soft water area. Not sure about using water full of lime though. Never tried.

Here we use Maiden's water, triple filtered through the gusset of a bar girls panties but, as there's only one of the former left in Manila, you've got to pay good money. The latter is free as it saves washing.

Seriously (honest) although tap-water isn't desirably potable - it's vaguely brown, I still use it (with the appropriate coolant - can't really call it antifreeze) in my system and, when I came to replace radiator, hoses, stat, etc., a year or so ago, was surprised how clean everything was.