So I have been having some acceleration issues with my 16' ecodiesel. The RAM mechanic (who the dealer tells me is the "best" diesel mechanic around) says to not use a K&N air filter with the eco diesel. Said they are oily and it messes up the air flow. Had to have some air flow sensor replaced. Also initially they told me would not be covered under warranty, because I used a K&N. Wanted $1200 to do all these repairs. I knew the service mgr. so got him involved and got out of there for $450. Verdict still out if its fully fixed. Interested to hear what y'all think? I have 30K miles on truck. Have had K&N since was new. Have serviced truck at this RAM dealer 3-4 times prior. NEVER once did they say anything about the K&N filter.