Plan and simple, synthetic oils are superior to conventional oils and blends.
As for the early oil change (1,000 mile mark), I am a firm believer that this helps to "flush" out, at an early opportunity (as opposed to waiting 5,000 or 10,000 miles), anything left over in the engine during the casting and building phase. Mainly metal shavings. Admittedly so, modern manufacturing is pretty good now, and this may have been more 'necessary' years ago, but I still like doing it. It's pretty cheap insurance.
I also feel confident stating the above, because I send out my oil samples to Blackstone Labs for used oil analysis (UOA's), and you can actually see & document the changes in trace wear metals. I do UOA's on my Porsches, not the Explorer, but the same logic applies. The only difference is an oil change for the Explorer is about $75. For the Porsches, it's over $250! They hold up to 10 quarts too.
None of my vehicles burn oil, and perform to a very high degree. The above, are some of the reasons why, I believe.