I'm farily certain I put in 5 year protection but not sure now and service recommend changing it after a certain mileage.
If I used an antifreeze tester and passed, would that be enough, or are there other reasons to change the coolant other than it passing an antifreeze check?
If I used an antifreeze tester and passed, would that be enough, or are there other reasons to change the coolant other than it passing an antifreeze check?