We all know that the IS300 has a very strong engine that can handle forced induction pretty well (judging from the supra at least). But i was wondering how much life would it take out from the car in terms of mileage. I know a lexus can go to 200,000+, but will the supercharger (lets say running at 6psi) ruin the longevity of the engine? When I buy the IS, i plan on keeping it for the lifetime of the car (or at least until 120,000-140,000 miles), so is it a good idea to throw in a supercharger? Im not gonna street drag race the thing everyday, but just show up some acuras once in a while..