Originally Posted by Jerry Bransford
X2, G-05 is a HOAT coolant & is a very good choice.
I don't know what you have (year, engine) but I think HOAT is what is called for. I just changed my coolant in my 06 Rubi. I looked up the offerings and I think I had a choice between Mopar at $35 per, or Zerex G05 at $18. Both are HOAT.
I ran the old stuff in a tester. They are about five bucks at the parts store or Wally World. The old coolant tested above the minimum, still good to go, but the new stuff was off the charts. Pretty sure that I coulda kept the old coolant in there for awhile but it's been at least three years. I try to do more preventive maintenance than repairs.
I flushed the old stuff out, put in boiling water to open the thermostat, flush again, fill with water and radiator flush, drive around couple of hours, flush, new distilled water, drive for a week, flush and fill with distilled water, flush, then new coolant/distilled water.
I figure the next flush will include the water pump and timing chain service. Good luck.