2010Accord22D

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.

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