Change 6-Year Old Coolant?
Yes, it is that old in my 2001 Dodge Dakota truck which has relatively low mileage for its age, 25,000 miles. The color of the coolant (original from factory) is still bright green and I don't see any other contaminant in it as far as I can see when checked opening the radiator cap and reservoir. The truck has never had any kind of overheating problem even when towing in hot weather. The temp gauge needle has always indicated no higher than the middle position.
Should I change the 6-year old coolant in my truck or leave it alone?