There is no question - it's an established fact - that factory fill oil has more metals and contaminants in it than subsequent fills will. What is NOT established as fact is how significant these elevated levels are. In theory, anything large enough to damage the engine should be removed by the oil filter.
Having said that, I prefer to err on the conservative side. I change oil in new vehicles at 1,000, 2,500, 5,000, then 10,000 miles, then change it at whatever interval the manual recommends after that. For my vehicles (all Toyota and Lexus) that means every 10,000 miles or one year, whichever happens first.
Note that even with these very frequent changes, analytically, wear metals and contaminants generally do not get down to completely normal levels until about 20 - 30,000 miles.
This is probably WAY overkill on my part, but it makes me comfortable, so that's what I do. I've followed this regimen on the past several new vehicles, and am currently following it on my 2017 Tundra and 2017 Lexus GS350. I get UOAs done on every oil change, again, a waste of money, but it is interesting to me, and it's kind of a hobby