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      08-03-2016, 10:16 AM   #38
SilverStreak18
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Drives: 08 SGM 335i Coupe
Join Date: Jun 2016
Location: SC

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Quote:
Originally Posted by Underground6t9 View Post
Don't get me wrong car runs really good, smooth.
I guess it doesn't really matter if it's running fine. It also depends if it's a n54 or n55 motor. n54s tend to get buildup a lot faster than the n55. Me personally though, I'd want the most performance out of my car so I might do it just for peace of mind.
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