Your factory fill is a H.O.A.T. formulation..."Mopar Anti-freeze/Coolant" MS-9769...part number 05066386AA.
If I needed to "top up" coolant, I would add a 50/50) mix of the above and distilled water...if you are only down a little, try just distilled water and check it later for freeze protection.
While I'm aware of the generic classes of coolants, I do not know enough to recommend a different brand to you...sorry.
Here's a quote from a petro board:
" Once the concentration of any "OAT" or "HOAT" filled cooling system has been "contaminated" with more than 10% silicate, borate, phosphate green snot of death, you'll be limited to a safe 24mos./24,000 miles. The newest Ford (Gold), Chrysler (orange) or Zerex G-05 (nearly colorless) are all "HOAT" G-05s and made by Valvoline/Zerex. I just noticed today at my local Wal*Mart that Prestone has now reformulated their "standard" antifreeze coolant (yellow jug) from silicate snot of death to a true silicate-free, borate-free, phosphate-free "OAT" chemistry, though it's still dyed green for familiarity."
THUS, I don't MIX agents !!!
If Tom sees this thread, he may offer options.
