04_lariat_4x4

Long story short, if you level your truck, you may or may not experience mpg loss, if you do it won't be any more than 1 mpg which isn't much at all. And obviously when you add the tires it gets worse. No point in removing a valence to test aerodynamics blah blah blah. It's not that big of a deal.

Brianstemm

WOW...