Just got my new Z, Question for the rest of you

Jacknasty33

Just picked up my new 370 last week. Brand new, but a 2010 model touring/sport MB 7AT no nav. 25% off the sticker with full warranty!

Now for my question...

On the way home from the dealership (about 400 miles), I averaged about 25 mpg all highway driving which I thought was pretty good. After a few days of aggressive around town driving getting used to it, I reset the MPG and tried to drive "normal" to see what kind of mileage I could get for my daily commute. After starting with some pretty disappointing numbers, I started driving in soccer mom territory. Moderate improvement but not much. Over a week of driving with no aggressive acceleration I'm only averaging 16.5 MPG. Is this normal? It been probably 70 degrees here on average. I expected it would be 19 at a minimum, especially with the granny driving. FYI I'm running 94 octane in it during this test.

I have noticed that the engine bay seems ungodly hot, and on a hotter 80+ degree day the car felt choked out a bit. All my temps are right where they should be, so I guess this may just be a false perception.

Thanks!