Quote:
Originally Posted by bimmer813
This is debated and will be debated forever. I broke my car in hard, doing full in-gear pulls once the car was warm.
Is this good for the car or not? Who knows. All scientific analysis I've read says it will help set the piston rings.
I'm no expert, but I know my 135i put down stupid big stock numbers on a dyno with 2k miles on it, as did a friend's 335i who did the same thing. A friend with a 435i who broke his in softly put down less than the average of what you see on the forums.
I went hard on my M235i. Also, it's a lease. Hah.
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This. My previous new car (Megane RS265) I was hitting the limiter by the time it had 35km on the odo.
Next dyno day it put down the most power of any stock car and even the dyno operator came over and said "This thing has been driven hard from new hasn't it...?" Apparently he could feel the difference in how hard it pulled.
When my new M235i arrives in August, it'll be the same deal
