Since our FiSTs have a turbocharger, I always use full synthetic oil. Full synthetic maintains its molecular integrity over a longer period than conventional oil does, and that's especially important for how much more heat it will need to withstand when compared to a naturally aspirated engine.
Since turbocharged engines are comparably more demanding than naturally aspirated engines, I personally won't wait any longer than 5,000 miles per interval. I think every 3,000 to 5,000 is a prudent range for our cars.
Now, if this were a naturally aspirated engine, I'd be inclined to decrease the maintenance interval to every 5,000 to 7,000 miles, assuming I'm using full synthetic.
I daily drive my FiST, so I change the oil once per season since I drive 38 miles per day on average.
As for oil filters, I invariably choose Motorcraft since that's what's recommended in the manual.