so I was like a lot of you, thinking the first or second tank would be in the 27-28mpg for the tank average especially with me behaving with the throttle during the break-in period. First two tanks were both calculated on Fuelly as 25.8 (kinda odd to be exactly the same) and the third tank was 28.7 - Yay!!. On this recent 4th tank, I actually wondered if I had broken the Fuel Gauge - LOL! I reset my tripometer at each filling so i looked at the trip miles and saw I had gone almost 80 miles and the fuel gauge had not moved off of FULL. As of this writing, the trip miles is at 300miles and the fuel gauge shows just under half a tank (computer says range to empty is estimated at 150 miles). It will be quite exciting if on only my fourth tank of gas I reach the 400 mile mark for a tank. This 4th tank is around the time various people say is the break-in period for the CX-5 and if this jump in mileage is any indicator, be patient. As for driving conditions, I live in Tampa so I have mostly flat roads, a couple bridges over the bay to climb, and typical rush hour traffic to navigate each day. Cheers!!