Thinking of going to visit your sister who lives several states away, but wondering how much it will cost in gas to get there? That is just a lot of math - whew! Get out the calculator, or.... go to www.costtodrive.com.
This is a simple and fun site that will do just that... figure out the cost (in gas) to drive from point A to point B in your make and model car. Doesn't have all the models and only goes as far back as 1999 (guess they figure you shouldn't go on a long trip with a car older than that), but you can get a rough idea.
Check it out. Maybe it costs less than you thought to go visit your sister.