We need two cars. I bought the mazda to replace my wife's aging Honda Civic last year. I loved it so much, that I replaced my Lexus LS400 with a vehicle my wife felt more comfortable driving, so I could drive the Mazda more often, which is when the 4runner showed up. At the time, my wife was working too. But now a days, she's not (we're expecting our first child, literally any day now), and she won't be going back to work. So, it just makes economical sense for me to commute in the mazda at 30mpg, then the 4runner at 19-20 mpg. Selling the Mazda would be of no use, as the profit after paying off the loan would not justify the decision. Plus, in all honesty, I prefer to drive the Mazda over the 4runner on my commute anyway "twisty back country roads". I hop in, turn on the heated leather seats, kick on the Bose, open the roof, and run through the gears of the triptronic gearbox, and zoom zoom zoom around horse farms at about 70 mph for 20 miles eachway. And my wife is in the much more safer 4runner with our son. You gotta' HIT that thing to cause injury, as where the Mazda, even with it's 10 airbags, I'm not so sure about.
Plus, we want to keep the 4runner for as long as possible, and rotate new cars against it.