Is it actually bad for the car to go WOT on a regular basis...like every time the car is driven? (which granted isn't that much 23k over almost 4 yrs - I didn't go above 4000 RPM for the 1st 3200 miles though)

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2006 BMW X5 4.8is Lemans Blue/Beige/Dark Maple
-Nav, Comfort Seats, Heated Steering Wheel,
Rear Airbags, AUX Input
2009 BMW M3 Space Grey/Black/Carbon
-all options