I bought an AG king 3540 last year and I have over 110 hours on it and it is still going strong. It sure is a workhorse. I was doing my yearly lube and oil and had a tuff time trying to find an oil filter for it. I decided to go to Wal-Mart and see what I could find, after close comparison I found a Fram oil filter that works great! FRAM PH43 has been a great filter! It's a little wider and a little shorter but the seal and the threads align up great. I could not however, find a hydraulic filter for it yet but if I do I will let you all know, guess I'll try NAPA. Thanks for the information you guys are giving out it sure helps.