What's the gas mileage like for a Nissan Xterra?

I've been asked to see if I would trade my car for a 2001 4X4 Nissan Xterra 5spd. I was just wondering for people out there who have one of these what kind of gas mileage you get. Also, is it a dependable car? This one has 110K miles on it. Let me know what you think about this car. I need to buy an suv because my family is growing.