Here is a website you should visit.
http://www.synthetic-oil-tech.com/d....s/ford5w20.htm
I went ahead and did my first change at 1000 miles. Then again at 3500. I switched to Mobil 1 5W 30 right away. The difference is small, but it is noticeably better.
If there was an amsoil distributor nearby, I'd try it, but the Mobil 1 is tops, and proven. I always laugh when people spend $30,000 or more on a new truck, and complain about an extra $20 on an oil change.
The Mobil 1 rocks.