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Old 11-14-2012, 02:13 PM
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halltristan halltristan is offline
Bimmer Enthusiast
Location: Tennessee
Join Date: Feb 2012
Posts: 660
Mein Auto: 325i and X3
Originally Posted by nivo View Post
The 4 ground electrode Plugs are especially made for 100k mile intervals.

On tests that have been done each electrode has about 25k in them so 4 of them would be 100k or close to before needing a change. Great plugs for longevity not for performance.
What about the plugs that only have one? (That's what I switched them out for: NGK - Iridium)

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