Hello Fellow Forders,
I've got a 2001 Supercrew with a 4.6 liter engine and 71,000 miles. I believe the engine has the original factory coolant and I'd like to change it. I've read the tech article in this forum about engine coolant flushing and my question is: How do I know how much 50/50 mix to put back in the radiator?

If, according to the article, I keep flushing the system with water and engine cleaner until it runs clear, then how much water is left in the system after the radiator has been drained?

If, say the system holds 20 quarts (for the sake of an example), and after I drain the system 10 quarts of water remains, then I would need to pour 10 quarts of antifreeze in the system to get a true 50/50 mix in the ENTIRE system. Am I thinking about at this properly?

Also, how do I know what antifreeze I've got besides being green, or is green a specific type. What does Ford recommend?

Any help is greatly appreciated,
Jack