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Im at sea level (in Montreal) humidity is around 50-60%, car has 25,000 miles, air filter is original from my understanding, and car is a 2008 e92. 105mph vs 110mph makes me feel like something is off but then again the track is concrete and traction is a huge issue, coupled with old air filter it might make sense.
Is spark plugs and air filter an issue on these cars?
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