Many threads, and many old myths can be found on this. Here's some information you may find helpful.
If you use conventional oil (sometimes refered to as "dyno" oil), its recommended it be changed every 3000 miles. If you use synthetic oils, then run them at least to 5000 to 6000 miles between changes. There are folks that use synthetic, and change the oil every 3000; you are wasting money if you pay for synthetic, but use conventional oil rules for changing. Both conventional and synthetics are good quality oils, but synthetics have a longer interval allowance between oil changes. They have a higher heat range (synthetics), and their additives last longer, hense the reason for extended mileage between changes. Driving conditions play a factor as to how often the oil stays; dusty conditions, towing, and "sprited" type driving wshould be considered to determine the interval between changes.
If you are one that thinks oil must be changed every 3000, then use conventional.
I, as many others here do, use the synthetic oils, and take advantage of their ability to carry me past the 3000 miles per change. Some even say longer (royal Purple and Amsoil).
As to what brand, well there are tons of threads on that subject. The search will net you plenty of reading. Oil filter? Stick with motorcraft; its at the top for quality oil filters.
It is better to keep your mouth closed and let people think you are a fool than to open it and remove all doubt.