Thread: Engine Noise!
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      04-03-2009, 07:42 PM   #2
E90xi
"BOSS"
United_States
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Drives: 2006 BMW 325xi Black Sapphire
Join Date: Jun 2008
Location: Moore, OK

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You might make sure it has premium fuel in it and not just regular fuel. Your neighbor might have just put regular fuel in it because he didn't "beat" on it. The sound you are hearing could be engine detonation, which can be very harmful to the engine. Make sure the correct fuel is in it.