Don’t obsess over gas mileage. Once you run the numbers, it is seldom worthwhile to sell your car just to get one with better mileage.
At 15,000 miles per year, a 5 MPG improvement saves you less than $500 per year in gasoline. A 10 MPG improvement, which is a huge difference in size of vehicle, gets you under $1,000. Weigh safety, convenience, comfort, etc. And transaction cost is too often neglected: time and trouble to sell a vehicle and buy another, wholesale vs. retail, sales tax, etc.
