Today, I drove into Atlanta and back. I had a little more than 170 miles on the odometer, so that tells me the last fillup at Braselton was correct. The tank was full when I left the RaceTrac station.
Today, my gauge was nearing 1/8 tank and I stopped here in town and filled up. The MPG average was 18 MPG. All my driving since returning from RFTH has been within 15 miles, so there was no interstate driving. The 18MPG is somewhat near what I normally average around here, locally. Even if I averaged the two tanks at 40 and 18, I would have gotten 29 which is a reasonable MPG for highway driving.