Gas free day

I didn't gas up yesterday. So I went gas free. But I dunno what impact people not gassing up had as an effect. On snopes they suggest that gas free days have been called since 1999 and they have little impact. It's not like it calls for reducing our gasoline consumption but merely moving by a day when you fill her up.

But I suppose it makes people feel good thinking they are doing their part to help the environment.