Quote:
Originally Posted by GORDON.M3
The adaptations on the ECU do. The butt dyno not so much. SYT_Shadow also recommends earlier spark plug intervals for the M3.
There is a reason behind why even BMW recommends shorter spark plug intervals when they sell the BMW Performance pack tune on the N54/N55 engines. Even when I did my plug service on my old 135i... just by looking at the plugs they looked like they could do another 20-30k but for peace of mind and for the greater health of the engine I replaced them earlier/according to the BMW PPK recommendations.
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Someone once showed logs where after 10k miles the car was no longer hitting targets. That's why I change mine every 10 -15k