Longtime Dodge guy...thank goodness I just found this site ... currently driving a 2014 RAM Laramie Longhorn Eco Diesel 144K miles and about three or four weeks ago started hearing a knocking noise. I thought it might be a clogged injector so I have run some injection cleaners and oil additives thru it, and put about another 2K miles on it but still hearing the knock...got on internet and this website and I am pretty nervous about what I see and read and what lies ahead. I put close to 5K a month on the truck and I luv it, before I had the truck leveled and some larger tires put on I was getting 27-29 mpg on highway... not now...now I just need it to run without the knocking sound. I have dropped down to about 22-24 mgh highway now. I dont think Dodge will be of much help either...drove by a dealership last week and they have pulled all their Eco's to the back of the building...You guys thoughts are welcome...Thanks!