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      04-01-2013, 05:28 PM   #21
thekurgan
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Drives: E90M3
Join Date: Aug 2007
Location: Sacramento

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2008 BMW M3  [0.00]
Quote:
Originally Posted by aussiem3 View Post
I should have also mentioned, that I use Shell V-Power too. I am still surprised with the amount of carbon build up on the plugs. If the fuel clean as they claim, how's there carbon on the plug tips. My exhaust tips are not bad. They are black and the build up is not gunky.
My only guess would be you're running a bit on the rich side? Lots of stop-and-go situations? Short distances when cold? O2 sensors starting to age? I'll put up a photo of mine, done at 22k or so, they didn't look that bad.
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08 E90M3 6MT Alpinweiss/Carbon/BPMSport 91 octane tune/BPMSport Feature coding/BMW Pedals/Dinan Exhaust/Alcantara Wheel/Rear Fog Switch/Rattle fixes