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Originally Posted by HaroldC
So I see no harm in driving in DS mode during break in. Engines that have been pushed, but not abused, tend to be looser and make more power. I have 68k+ miles on the M3 (with a lot of track miles)and it has been supercharged for the last 5k and shows no sign of wear or slowing down. In fact it recently put down 406 rwhp (which I hope will be even higher with the new rev limit).
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Oh good, I don't feel bad when I redline the X3 once in a while. When I gotta pass on those country roads.........gotta muster up all 184 horses! :p
I feel like it's wear and tear on the automatic gearbox though. It already goes thru a lot of hill-holding (AT program) and manual engine braking (via manual mode) in Charlottesville, which is at the foot of the Appalachain mountains.