Well, allow me to add to this topic without hijacking the thread, please.
Yours truly has a very well-maintained 2005 Toyota Highlander with 36k miles on it. I took it to the dealer last Thursday to have the cooling system flushed. They offered to drain and refill. I said, "no, flush the entire system. Don't you have a coolant flushing machine? "Yep", they said, "it just costs extra."
So, they flushed away, I paid up, went home to load up for my trip to Illinois, popped the hood just for kicks and grins, and there sat green coolant in my radiator and recovery tank. Not the OEM pink coolant, mind you, green stuff. Whose green stuff? I do not know. Yet.
Nice. Real nice.
Now, Toyota just lost all credibililty about voiding ANY warranty for using "non-specified fluids."
This dealership normally telephones within two business days after the service to inquire as to my "satisfaction" with their work. I'm actually looking forward to their phone call.