In my small town there isnt really any traffic. I also drive 6 miles from my house to the first stop light and at that point about 2 more miles to work hitting a few stops. I average 28.6 but it is mostly highway given my commute. That tank is still "city" but like I said there isnt any traffic. I took a trip to san diego not long ago and hit almost 90 miles per 1/6th of a tank the whole way down. That changed as I hit LA and drove around san diego for a while. I still averaged 29 while I was there but we were mostly in the hills of riverside so it was still mostly highway. With the wing up and "spirited" driving...... I dont even figure it lol

Edit: While I was on the way to san diego I was following my dad who drives 5 under the speed limit.