[Biturbos4] Turbo questions

[Robert Bullivant]

I recently bought a 2001.5 Avant S4 with 26,000 on it.  I've been 
reading the list regurading turbo whoes.
Someone please fill me in as I've had several turbo cars before and got 
75,000 minimum out of the turbos,
some over 100,000.  Of course I should preface by saying I've used only 
Red Line or Mobile One synthetic
and changed at 3,500 - 4,000 intervals, and have let the cars run for 30 
-60 seconds in hot weather prior to
shut down.  What gives with Audi's turbos and their apparent lack of 
staying power?


Rob