Well ladies and gentlemen, here are some updates on my new STS after 10 days..Average gas mileage was about 19 MPG. I would say it was half freeway and half local for the tank. Not bad for a powerful V8 and I bet it will improve. Especially when I stop impressing my friends with its acceleration. RPM's @ 60MPH about 1900, @ 70MPH about 2000 and 80MPH 2100.
Couple of minor problems, trunk is hard to close, there's already a small crack in the wood near the shift lever. I am sure Caddy will take of these.
Still getting used to the keyless entry system. Weird walking away and the car locks by itself.
Absolutely one fast, smooth, quiet impressive piece of technology.. GM should be proud.
Any questions.....Go right ahead and ask..
Anthony