I use "Acar" app and after almost a year, my current average for the entire time is 17.56. The highest average I ever got out of a tankful was 19.95 and the lowest was 15.62.

The this is better than my old S6 for some reason which had a full time avg of 16.326.

Same driving habits too.

The long term computer reads a little over 20. Most of my driving is a 25 mile highway commute with light traffic in the morning and moderate to heavy traffic in the evening. My best one way commutes read 30 mpg, but this is at a slight downhill and the car is in 4 cylinder mode most of the time.

For short trips around town, 12-15 is pretty common. Trying to accelerate gently doesn't seem to improve the stop and go mileage much at all.

Made a trip down to Charleston cruising at 75 to 80 mph. Drove around town a lot then filled up during the trip home. Got 23.5 mpg which really isn't bad when you count in the city driving.

These cars have long legs, meaning they don't get good gas mileage making short trips. I was hoping to get 20 mpg around here in the suburbs but so far it has been 18.5 to 19.

18 to 19 around town is great mileage. Like you said, these cars use the most gas while accelerating from a stop.

Another thing to note though, is how many people getting better mpg are getting into 8-4 cylinder deactivation mode.

Here in the northeast, the winter has been brutally cold. The cylinder deactivation doesnt kick in until the engine has reached a certain temp. Unfortunately for me, that is nearly 1/2 of the way to work since Im barely getting over 40mph to warm up the car.

In the summer my car is pretty much in 4cyl mode after about a mile of driving. Now in the winter its pretty much 5 miles. My commute is only 9 miles. Much worse mpg in the winter than summer.

Hear hear! In winter I generally use about 25% more fuel for the same trip.

I've never run into the cylinder deactivation not kicking in due to the cold but that would make sense. Just another reason why those short trips are the worse for fuel economy. In that kind of cold combined with a short trip, I can imagine it being pretty bad.

Driving in LA in traffic all the time and then gunning it as soon as I see daylight is giving me pretty bad gas mileage. I don't want to calculate it but I know it's nowhere near 20mpg.

Its all relative to driving style and distance...
 

I have seen a range of gas mileage, which has all been dependent on driving style and distance. Below is some of the MPG numbers I've seen:

City:

• Casual driving in comfort mode (warm engine) ~ 14-16 MPG
• Aggressive driving in dynamic (warm engine) ~ 9-11 MPG
• Driving in comfort or dynamic (cold engine) ~ 7-8 MPG

Highway:

• Casual driving in comfort mode (50+ miles) making an effort to keep cylinder deactivation on (65-75 MPH) ~ 23-25 MPG
• Casual driving in comfort mode (50+ miles / 75-90 MPH) ~ 18-20 MPG
• Aggressive driving in dynamic mode (50+ miles / 80-1XX MPH) ~ 16 - 19 MPG

I'd say on average I'm getting 14-17 MPG per tank, as I spend very little time on the highway every week. While I'd love higher MPG numbers, I can't blame the car with my heavy foot.

i get about 200-220ish miles, from full tank to when the last bar and red light turns on saying i have about 30-35 miles of range left.