Bought a 2010 6.2 about 10 months ago with 35,000 miles on it. Somewhere right around the time I first changed oil in it I noticed a very loud lifter knock for a minute or so after start up. I used the recommended oil and a K&N filter. Is there a different filter I can use to quiet the tick down again? A truck with less than 50k shouldnt have this much startup noise.