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What is a KN air filter?
I also have a x20d and have exactly the same 7.4 l/100km after 16,000 km. Driving is largely 80 % freeway at average 100km. My average speed on the computer is 49.0 km/h. I also have the large 18" wheels which I'm sure impacts the economy somewhat.
Whilst I'm very happy I'm interested in the air filter you mentioned, can you provide more information.
thanks
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