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      02-22-2008, 10:36 PM   #18
scs
First Lieutenant
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Drives: 135i
Join Date: May 2008
Location: 98632

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the less boost you use the better off the engine will be, these turbo motors run mild compression which offsets the compression increase when you're on the boost. in theory if you aren't always flogging the motor, you should get many, many miles do to the less stress when off boost. the higher the boost (psi) the higher the compression, which leads to detonation.
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