Thread: E92 Octane Rating
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      04-20-2017, 02:52 PM   #19
Helmsman
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Drives: 2011 AW E90 M3 ZCP
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Quote:
Originally Posted by m3m3mr View Post
Do NOT use octane booster in these cars. You will foul the spark plugs and potentially lose performance.
Curious to learn - why is that?
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