[very low mpg]

hi, new here. Bought my 2.2 i-dtec auto few weeks ago. I'm getting around 31mpg, is that norm? Everyone else seems to be getting around 40+ mpg. What could be the issue? My driving style is easy on throttle, no crazy hard acceleration, thanks.

[Whine]

I've had the same issue on my accord two days ago, yesterday morning the problem wasn't there anymore. I'm well confused.