Lift question

I daily drive my fronty, as I am sure many do here. However I have considered doing a 2" or 3" lift ony my 2010 SE CC, and I do plan on keeping the stock tire size. I want the stock look, but still that "there something different" look. So with a small lift like 2-3" and stock tire sizes, will this effect my gas mileage? I drive quite a bit and am not looking to hurt my gas mileage much. Can some one please give me an idea of what this will do to my gas mileage, if any (looking for city, as this is mostly what I drive).