Thread: M3 sparkplugs after 3 years?
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Old 07-04-2021, 08:56 PM   #8
Nick M3
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Join Date: Oct 2003
Location: Bethesda, MD
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Quote:
Originally Posted by John V View Post
Dealerships make most of their money from service?
I wouldn’t be surprised if the S55 eats plugs in other ways.

Run plugs too long in an S65, and it’ll cost you 30-40hp.
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