Not lifetime coolant. Should be no more than 5yr./150k mi. whichever comes 1st.
Also, when was the last time you cleaned the radiators? They clog up fairly easily after a few years.
Also, are both fans working? Turn on AC and go to the front to check. It's not uncommon for the ballast resistor on one or both of the fans to go. Replacement is available and you need to splice it into the original harness, not a big deal, but you need to pull the bumper, a good thing is to plan a radiator cleaning at the same time.
