Can't hurt, but not necessary, IMO. To me, it would seem to be a waste of money. But, if it gives you peace of mind, go for it.
As far as oil goes, I think it is largely personal preference. I've always been partial to Mobil 1 full synthetic in anything I really care about. But, again, that's just me. If you really want an engaging debate on oil, visit the forums at http://www.bobistheoilguy.com. With that said, even though I'm a DIY guy, I'll probably have my dealer perform all scheduled maintenance while the vehicle is still under warranty. I think the Motorcraft synthetic blend will be just fine.