Our main car is a 2004 Prius, so the gas mileage is pretty good (lifetime average of ~50mpg). The other car that I drive right now is a 1997 Sunfire that averages about 30 mpg in (almost nabbed a 2003 Honda Insight the other day, but thats another story). I also have a 1981 Honda CM400 that gets me 45+ mpg that I ride when weather allows. My daily commute is 14 miles round trip. Hers is about double that. We also are conscious about combining trips, and if we can, we'd rather walk (weather allowing). So, nope, we don't use a ton of fuel.