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      09-28-2018, 05:39 PM   #18
BMWDriverX
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Drives: G12 750i X-Drive
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Quote:
Originally Posted by arucano View Post
the additive will damage the catalytic converter. There is likely a lead additive or something of that nature in it.
Not only that but even if you don't have cats the additives foul your spark plugs. I never had good long term results using them. Once in a while is fine
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