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I ran a newer M5 a couple of weeks ago, basically dead even, I pulled slightly
However they (BMW and AMG) are running 25+ psi to attain those power levels and no one cares about resulting oil dilution and loss of compression..................except for the poor sap who buys it used. Intakes covered in oil are the norm. Not sure where you can install a catch can.
The trend of pushing boost levels ever higher on smaller displacement engines to meet fuel economy/emission standards will be very interesting to watch. I don't see these motors holding good compression past 70-80k miles but time will tell
Remember when 8 psi was the norm?
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