Premix & NA engine longevity
 

How will premixing affect a non-turbo engine's longevity? I know that most NA engines last 100-150k miles with normal maintenance (normal user neglect), and that a well maintained NA engine can last 200k miles on the stock oil injection system.

It seems that premix is a superior lubrication solution in pretty much every way, and it would make sense that an engine running premix would last longer. Has anyone had a NA engine running premix just die of old age, and if so, what kind of mileage did you get from it?

-=Russ=-