2007 A8L Maintenance Questions
#11
AudiWorld Super User
I've run K&N filter on my 1999 D2 for ten years with no issues. I have two in my W12 now with two years on the clock with no issues. I don't feel any power deference but I use them for fuel economy. With my D2 I got about 15 more miles on a tank of gas. Not a big deal. I got about 20 miles on my 1994 Q45 back in the day. I don't know about the W12 mileage improvement if any since I put them in since I've owned the car.
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