Re: K & n ?
I used a K&N on my 03 rubicon for four years, no problems. I never heard anyone having a problem with the oil. I did notice a slight increase in power, but that is based off of a straight 6 on a lifted Jeep, so probably anything helps that! LOL I am getting one for my 07GC 4.7. It's pretty simple, more air in = more power out.