The stock crossbars hold up fine. I take it off when its not needed. Like NWCX9 said, it is very easy to take on and off. It does help to have an extra set of hands to get up there. Thule uses their quick grip mounting system, which is basically four claws that clamp down on your crossbars. There are four knobs on the inside of the box that you turn to tighten or loosen the claws. Very easy.
I only use the box for family vacations where we need to bring a ton of stuff. Like I said I have a couple little kids and the back fills up pretty quickly with strollers, bouncy seats, toys, you name it. I have no idea what it does to the mpg.
I only use the box for family vacations where we need to bring a ton of stuff. Like I said I have a couple little kids and the back fills up pretty quickly with strollers, bouncy seats, toys, you name it. I have no idea what it does to the mpg.