You have no clue about what part?
Last time I filled the system, I used one gallon of antifreeze, two bottles of Water Wetter, then topped the rest off with water. I've only ever added water to the system when it needed it.
The coolant might be safe up to 250* but the car starts to shut down once the needle on the water temp gauge goes much higher than the 210* mark. So either the water temp gauge reads a lot lower than the actual water temp, or the computer has it programmed to cut power above 210*
Checked the fans yesterday, both fans are on at idle and after shutting the car off. I can only assume they are both on while I'm driving too.
Thinking a clogged radiator might be the culprit. Really need to do a flush out of the system and get my new thermostat installed.
That's the plan soon as I get time hopefully next week. Til then I'll just cut the a/c off when sitting so it doesn't run too hot.