We have a 2004 Saturn Ion. Check out the awesome MPG we get on it:
This is real data. From actual data points my wife and I have painstakingly recorded each time we fill up. The spikes in the chart above correspond to road-trips. You can tell by the nature of the spikes that we have not taken more than one-tank road trips lately
Predictably, there is a lower MPG in the winter months where you have more stops and slow-downs.
Corresponding to the above, this is how much we have been using our car:
If you want to record and view data about your car in a fun way like this, head over to http://www.mymilemarker.com