I think this comes under the heading of " if there isnt a problem then dont fix it". You know that conventional water based coolants work - you've used them all your life and the manufacturer of your engine uses them too. So why pay extra for no real gain?
The Evans coolant is slightly less good at removing heat - thats shown by the temperature rise quoted as 3 to 7 degrees. You dont know its long term effect on seals. You only have their description to go on.
Why bother?
