Re: Radiator coolant/water ratio?
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I'd go by what it says on the packet, and also:
- Choose the longest lasting coolant available - I think for example Nulon make a ten year or 1 million km coolant now?
- Make sure the manufacturer says its suitable for your car
- Flush the radiator properly with tap and then distilled water
- Mix it with distilled water in the highest ratio of coolant to water recommended on the pack - unless you have overheating problems more corrosion protection would be better than less
- Change it out at about 2/3 of the interval recommended by the coolant manufacturer. Given a coolant change is only going to cost about $100 and a few hours of your time, if it saves you a single radiator, heater core, transmission heat exchanger, or welch plug its paid for itself many times over :-)
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