Alster;
Sorry to here about the (3-Drops-Of-Oil)

, hopefully the Dealer will resolve that situation for you.
Your fuel mileage sounds pretty good to me and I also read where you said once the pump cut off you could still get 2-more gallons of fuel in tank to the very top, not one more drop. The Civic (Non-Hybrid) that I traded in on the Incoming Jan. 06 HCH ll was the same way you have described. It would hold somewhere around two more gallons after pump first cut off. I could drive along time on the interstate before the fuel gauge would drop below the Line that showed Full. I kinda liked that, it was fun to drive like forever and the fuel gauge still showing Full.
Say I forgot to ask you how are you all driving the car as far as speeds? Are you really driving for very high FE or just driving it like any other car and letting the FE fall as it will?
Terry