For those of us with the AOD, I know the adaptive PCM does get better with mileage. If I would stop unhooking the battery, perhaps mine would seat itself. Battery disconnected after initial purchase, for Driving lamp install, for fuel tank replacement.
V-6 AOD - MPG averaging 18 - 19 w/3,800 miles. Ride him like I'm launching from a 1/4 mile Christmas Tree light, except when my son is in the car with me!!!!