I bought the platinum extended warranty from the dealer for $1500 / 100k or 7 years deal. There are good things and bad things about it. I had a similar warranty from CarMax once, for a Jeep, that was a better warranty.
I stalled to accept the warranty when buying a new 2011 Expe 4x4, so the dealer dropped the price a lot. Keep that in mind. Altogether I used the warranty for a power steering thang, a busted strut, broken "actuator" in the fan blower knob, busted rear latch, and rebuilt front end (everything), and brakes all around (pads, rotors, calipers). Certainly got my $1500 worth out of that.
Two or three problems - Ford-at-the-dealer misinformed me about the ending date, and I almost paid for some work that should of been covered. The Ford Warranty company sent me a post card warning me of the deadline, and I got in for final fixes with 99,300 miles. So don't trust the dealer to help you. A second thing - only Ford will do the warranty work. They are so cheap! They only paid for one strut when it broke, not both in the front. Also, they wouldn't fix the obviously warped rotors until the pads were worn down to 3 mm. SO I drove around with a nagging sound for 35,000 miles, waiting for them to pay for this. My only consolation is that I sang the "Ford is so cheap" song for the full 35,000 miles. The third problem, or better solution for the owner, is when you can get your car fixed by any mechanic under the warranty, not just cheapo-Ford. This was how the CarMax Jeep warranty worked. Show up at a mechanic, ask him to find something wrong, and presto - he gets a lot of work and you get new stuff. Seems like I replaced that entire Jeep, except the antenna, during the 80k warranty. Buy your Ford from CarMax?