There's no good answer to this question.
It all depends on a crapload of other factors - what kind of oil you run, how hard you push your car, how often and for what duration you push it, how well you treat it afterwards, how often you change the oil, what kind of shape the rest of your engine is is, what kind of shape the turbo itself is in, what type of weather you drive in, how high above sea level you live, whether you have hardpipes and an aftermarket intercooler, what route the hardpipes take if you have them, how well your injectors flow, what shape your fuel pump is in...
I could go on for another page or so, but I think you may be getting the idea by now.