We've had one for 5 years, and ours is better than sticker.
I'll take our real world experience over anything I read.
My husband went 700 miles on 1 tank of gas. The tank holds 11 gallons.
That was the best we got. On average we get around 40-45 mpg. Sometimes it's up to 50, especially when I'm not driving. I like to crank up the heat or a/c.