It is starting to get a bit chilly here in Central PA, I want to do a flush and fill of my radiator, but I am hearing / reading all kinds of things about the proper coolant/ anti freeze / additives/ corrosion / cavitation and all kinds of stuff I don't really understand. Does somebody have a really good write up or description of what to do, how to do it, what to use, etc.? THANKS IN ADVANCE!