Antifreeze or for that matter all fluids. Use ONLY THE RECOMMENDED fluids for replacement or topping off. The only exception would be GM lifetime apparently it works fine unless you have a low coolant issue then it causes a fine powder to form on certain metals and this in turn will plug some parts of the HVAC system. So I would top it off with GM but for replacement I would use a suitable replacement IE good old green.There are a number of new vehicles and innovations coming out and it seems as if each has its own quirks. also do believe the pitch that if you add an additive to a fluid it will replace the correct one this usually does not save any $ and also does not work have seen numerous claims about Chrysler trans fluid lately and they do not work. More on additives later.