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      05-17-2008, 09:39 AM   #1
e.n335
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Drives: e93 ///M3 DCT, 07/2009
Join Date: Feb 2007
Location: Switzerland, ZH

Posts: 4,480
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This is a brand-new spark plug:



After 16000 miles, all of them with piggyback tunings, using Shell V-power gas only ( 95.5 octane AKI = 100 octane RON ) my spark plugs look like this:



No visible wear, color grey, spark plugs of cylinder 5 + 6 don't look different ( cylinder 1-6 from left to right ). IMO I changed too early, but this is good to know.

Looks good to me.
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