Wondering how many miles before the turbo should be replaced? I was told the seals will go bad around 100k, and that can be fatal. Wanna get as much life out possible. Bought the car used, replaced timing belt, w-pump, ac compressor, and change oil every 3000 mi with mobile 1 full synthetic 10-30. Any way to check the seals or should I just buy a new turbo and seals or? Help!