Well I am a KEC cleaner so the oil is not a problem. The inital set up for the filtering and mixing cost me about 200 dollars and most of that was the filters and a little for some PVC ect. Since June I have processed just over 200 gallons and the filters in the set up look like they have alot of life left, of course that is dependent on how clean the oil is in the first place. I have chatted with a guy in a city just north of me that has been running 4 International Cat engined trash trucks for almost 2 years with the same set up and has had no problems with injectors ,fuel pumps or filters. I am a little scared to run the truck in cold winters with it but as far as the burners it has been bulletproof.