My feeling is that it's not the type or viscosity of the oil you use but how often you change it is what determines the engine longevity. Once the oil ages, corrosion on the rings and bearings accelerates, which greatly increases the wear on these critical parts. I think I partly owe my 300,000-mile engine running like new to the very short OCIs I did in the past, never exceeding 3000 miles with conventional oil.
Unfortunately, manufacturers have been pushing the OCIs to the limits and beyond because of environmental concerns, even though oil is recycled.
If you will exceed 5000 - 7500 miles, use the best synthetic oil you can find, with plenty of PAO or, if not, GTL.