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Message: <blockquote data-quote="seb" data-source="post: 12522" data-attributes="member: 1607"><p>Hi all. Been enquiring about coolant change with a few BMW garages. I asked them what they normaly do when doing coolant change and all of them say they only put 1.5 litres of coolant plus the rest water. Is this OK?? I know the spec says 50:50 coolant and distilled water. I can accept if they use less coolant as our weather is warm but to use tap water ....? When I mentioned distilled water or battery water to them the gave me a funny look. I know also that our tap water is not as heavy as some europeans or american in terms of carbonate and other mineral.. What do you do for your car? 50;50 mixture of distilled water and coolant always?  Please share your practice. Thanks.</p></blockquote><p></p>