Learning to Drive on my New HHR

In June I traded in my 2003 Subaru Outback for a Chevrolet HHR
My Subaru had been to our mechanic for a serious repair and before that repair could be done the mechanic, a good friend of ours, found another, more serious problem...a head gasket leak......
So...to avoid that costly repair - while I was still making payments on the Subaru, we decided it would be better to just trade it in on a more efficient, new car.
The HHR, while not in the MOST efficent category (most of those are generally unavailable these days - or WAY too costly) is rated at 24 MPG City 30 MPG Highway...and I have been seeing those estimates hit in real life.
I also got a NO interest loan...which made it really affordable...and not only that, but it is COOL too!


And, little did I suspect when we bought this beauty, but she's teaching me how to drive again.
How is this possible when I have been driving since I was 16 1/2? Let me tell you how...
This car - as many of the Chevrolet/GM models do - has a driver information center that gives the driver a whole lot of information...most importantly an INSTANT fuel usage reading and an average fuel usage reading.
I am using the instant readout to learn how to drive more efficiently...and let me tell you that in the 6 weeks I've owned the car my driving has changed signifigantly. One big thing is simply taking my foot OFF of the gas pedal, it's former default position.
When doing that going down a hill the following readout is possible


So, in general I have been averaging 25-27 mpg over all - not terrible when considering the amount of traffic I have to fight if I take the main highway to work...the number of stop lights on the back way to work. On the rare occaision the highway is clear I have averaged more than the advertised 30MPG for the duration of the trip. How do I know this? I reset the Average reading as I pulled onto the highway when I saw it was clear!