Alrighty!!!
I guess I have learned a lot here in a few days. Allow me to relay this info. I worked at a Ford plant in their prototype dept. One day a co-worker brings in a water pump from a Jeep (6 cyl. in-line I believe) and the vanes were completely disintegrated (I think it was cast Iron). Gone, Missing. Kaput. I couldn't figure it out, WE couldn't figure it out, All I could think was when I use to run a test on Aircraft oil-coolers and once had to mix some sand in to simulate residue from a casting operation that didn't get completely cleaned out. That was what we attributed it too. That oil cooler lasted just a few minutes at that time, it was Al. sheet plate and fin.
NOW I think I know why the water pump vanes disappeared. It had to do with the type of anti-freeze used and how it was maintained. I and probably most people never see one from years of use. There not a high item replacement. I usually don't replace them myself. We either get rid of a vehicle when a problem rears it's ugly head or buy a new one and let someone else think about it. Also I don't think there were problems like this when I was younger. Although I remember back in the 60-70's wishing I could get rid of rust in my cooling system then. (318 cid's)
NOW we're dealing with all aluminum systems.. with mixed in brass and a little steel.. You'll have to excuse me, but the bombardment of all these terms still confuses me. G-05, OAT, gold, green, 2-EHA, red, orange, ah-choo etc. etc. It's just not my expertise and not something I want to get into. I am more concerned about motor oil than coolant.
AS Bullwinkle assured me, I'm now happy with that Dark Green Specialty Coolant and am wondering if I could use it in an '05 Ford Escape Hybrid and even my '00 Explorer, But if I must keep 3 separate bottles, I will. Technology is moving faster than any time before and WILL move even more faster due to mileage standards to come, Seriously from my experience only a FEW real engineer's actually involved with say the cooling system and coolants would know the real truth and you won't see them publish or tell the public, Only by chance if one should be interested in this would they be here to help people. I guess we have to go with what IS published and rely on people who work with multiple engines and tear-downs daily (like Mechanicx) who have more experience than say I as a shade tree person who can only top off and change. Well that's my $.02 and it's free to you.