 And the salesman that I'm talking to thinks that I need a four-wheel drive. My main question is, what is the difference in gas mileage between a two-wheel drive and a four-wheel drive? You know, the four-wheel drive adds a little extra weight to the vehicle, so I don't know the exact mileage, but my rule of thumb is a four-wheel drive will usually get about five miles less per gallon in the city and about three miles less per gallon on the highway. It's not substantial, but