Friday, I did a 400 mile roundtrip.
Mostly highway (66 to 76 mph), some stop and go, maybe 15% country roads, 2 or 3 times heavy on the gas for passing or merging, mostly Eco, mostly cruise on, AC on the entire time, auto start-stop on, 4 or 5 stops along the way, 87 fuel.
Filled the tank to the tippy top before departure and again on arriving home. I guess I had maybe 3 or 4ish gallons left in the tank when I got home.