The one thing about the Evan is that the boiling point is higher than the anti-freeze. It is used with NO water at all. If the system is new and dray, just add it, If it has water in it, you need to flush it with their flush.
Personally, I don't want any higher temps., 50/50 or a little weaker in the summer, and 50/50 in the winter, along w/ alum. protector of some sort.
As a sidenote, I drove a 2002 dodge quadcab, for 15 yrs. w/ the same antifreeze in it, never had any problems w/ that truck, except front wheel bearings, and had to put a cheap ebay radiator in it because the plastic to alum. seam started leaking. Always had to add a little for winter tho.
