You can call ahead to a few different dealerships to find out what promotions; they are running that can benefit you. Do it before going out to a million different places.
On average, they will offer coverage for three years or 36,000 miles, or whichever comes first.
Extended warranties are warranties that come in after the manufacturer's warranty is in place.
If car manufacturers can benefit from economies of scale of NAFTA why not you as a consumer? You can not have your cake and eat it too.
However, if your car actually qualifies as a lemon under your state's lemon law, generally you receive a replacement or monetary compensation vehicle.
However, despite the presence of these laws, nothing beats prudent practice to avoid buying a lemon in the first place.