Good info. Here is a bit more info on the coolant. Note that the factory fill only protects down to -34F, but you can get concentrate versions of the coolant to dial it in to your specific climate (drop the "DIL" or "DL") from the part number. Also, Canadian part numbers get a "C" as a suffix.
Testing coolant for corrosion inhibitor is a bit of an oddity as the 3-way motorcraft test strip contains a residual additive test, but the Motorcraft Coolant Compatibility chart lists the part but states to only use the nitrite contamination portion of the strip. Apparently, coolant testing is done away with entirely if the vehicle is running straight yellow coolant.
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