[Taxidriver]

I have not looked into the "toughness" of modern turbo engines, so what will be the long-term reliability of the N20? Last time i looked into turbo engines was back in the early 1990s with the Supra and Nissan 300ZX. Is synthetic oil required? Are there problems with carbon build up the valves in engines that are pushed hard? What ever happened to turbo timers? (it automatically lets the engine idle for 1 minute after you turn off to the off position to let the oil cool).