The engines life span no matter N/A or Turbo or Supercharger all depends on one major part, How good is your tune??
Then it will depend on how well you maintain it.
How you drive it will affect it but the most important factor IMO will be how good is your tune.
Think of it this way you can have the prettiest girl with the best looking set of :boobies: and etc. but if she has a nasty attitude do you think it will last??
Drive the car the way you built it.
