Thanks for the replies. Points of interest:
1. That’s my current coolant level and it does not go below that level.
2. After 10 minutes of idling, my exhaust drips once every 6 seconds. My sister’s Chevy Captiva dripped twice in one minute. Exhaust pipe angle could play a role.
3. I can’t discern a change in oil color. Looks normal to me.
4. There are two 8 inch diameter wet marks under the vehicle. One presumably is from the AC and the other? Water pump as someone suggested, perhaps? Both were clear, not orange.
Although you have a 4th generation and I have a 3rd generation with the 3.5 Ecoboost - the cooling system, hoses, water pump and degas bottle are very similar.
I had leaking coolant hoses (replaced under Ford’s ESP) and a leaking degas bottle (replaced under Ford’s ESP). The bottle had a crack at the point where the rubber hose connects to the bottle (where there is a metal reinforcement insert). The bottle would only leak if the hose was wiggled at the fitting.
The water pump later leaked slowly, and only while driving. The coolant level went down very slowly, and I had no residue on the ground when parked.
It took two trips to the Ford dealer for a correct diagnosis and repair. The first trip they pressure tested the coolant system with the engine off - and declared there was no leak.
The second trip I insisted the engine be examined from underneath (I had four surgeries and can no longer crawl around under cars). The service advisor said the mechanic quickly found the leak, as there were coolant residue marks around the water pump. This was at 70,*** miles (purchased new).
From other posts on this forum, it seems the Ecoboost water pump is prone to failure between 65,000 - 80,000 miles.