Percentage of Anti-freeze

[Frank G]

Hi Everyone,
I'm sure that this has been brought up in the past, but I couldn't find a previous post on the site.
So sorry if that's the case.
My question is what proportion of anti-freeze should I use when I drain the system?
I've seen 25% mentioned as the correct ratio to stop it freezing up, but I seem to remember that 50% was mentioned somewhere for anti-corrosion reasons.
What's the panel think?
Thanks,
Frank

[nib]

Get 6 pints in and you wont be going far wrong Frank.
Mark

[DJT]

30-35% is fine. Too much actually has a detrimental effect on cooling as anti-freeze doesn't have the same ability to cool as water does. This level is fine to prevent freezing in our weather conditions and sufficient to deter corrosion. As nib says, 6 pints (3.5-litres) is good.

Anti-freeze.jpg

Dave

[SUTTY1]

I'd be inclined towards 50%.
Thats the figure recomended by most car manufacturers today, also pretty sure i've 50% reccomended on tony hart site

Steve

[dasadrew]

.. I couldn't find a previous post on the site.....

There's loads of info if you want to trawl through it! Try this one for a starter:

http://www.stag.org.uk/forum/showthread.php?9349-Antifreeze&highlight=anti+freeze

Type 'anti freeze' into the search box, press the magnifying glass symbol, and hey presto!

Biggest anti-freeze concern is the colour.

[Coppo]

Hi Frank.

I use a mixture of 1 ltr of anti freeze to 2 ltrs of water, (33%) I drive my car everyday in all types of weather also been to Norway in the winter. Have had no problems with the cooling system.
The one thing I do is every year is flush the system out and put in a fresh mixture.
Hope this helps.
Cheers.
Paul.

[Moraystag]

I use a 50/50 ratio mix, primarily to limit corrosion. Never had cooling problems so far, even befopre the pump was refurbed

Mike

[wilf]

Another user of a 50/50 mix. It is just so easy to remember..........

[STAG1973]

Use deionised water if you live in a "hard water area" prevent furring up of your water ways..

Adrian