I dropped my first oil after a few thousand, waste of money. With an aviation background I cut open the oil filter and there wasn't a single metal shaving anywhere in the entire element. This was a first for me. I recently ran my oil 10,000 miles and sent a sample to Blackstone, oil was still good to go and had enough additives to run past 15,000 miles. Unless you don't drive far enough to heat the oil up enough to boil off the humidity, according to Ford and Blackstone, a change short of 10,000 is a waste of money.