[Biturbos4] Upgraded K03's durability

[Brad R]

All this turbo talk lately, combined with the fact that I just had mine
replaced last week, got me thinking.  My dealer put in the 078-145-701(&2)-S
turbos as the replacement on my stock 2000 S4.  I have read that these are
"upgraded", but I was curious as to just how upgraded they are.  Can I
expect these to be a much more durable then the original K03's that just
went south on me?  What kind of lifespan can I expect with these upgraded
units, assuming I stay stock?  Alternatly, could I realistically expect
these "upgraded" turbos to withstand the additional stress of chipping
better then the original turbos that were just replaced?  I would like to
chip my car, but I'm still out on that, due to reliability--it is a concern
for me.

FWIW, the turbos that went bad on my car did so after 65000 miles.  They
have had Mobil 1 oil changes performed in 5000 mile intervals, at most.  I'm
not sure how they were treated for the 52k miles, but I have treated them
well over the 13k I have had the car.  I was told by the service advisor
that the inner oil seal went bad on one.  I am still getting some small
amounts of smoke and the smell of oil out of the exhaust, but I expect that
is just residual and will eventually all burn off.  Of course I am closely
monitoring the oil use until I am convinced of such.

Thanks for your input.

Brad