I've only run used motor oil through it once (that first tank when I bought the truck), but yeah, I've got a nice little fuel-processing station in my trailer. It's not set up yet, but I've got a Spinner II centrifuge that will filter oil/fuel down to .1 microns or something ridiculous like that. I dunno, I don't even know what organometallic additives are. But I have a 93 gallon fuel tank down between the framerails in my trailer, and I'm planning on carrying a few 55 gallon drums that I'll be able to carry different types of fuel and oil and whatever else in. I think I'm going to arrange it so that ALL of the fuel I take on will go through the centrifuge, and then to any one of numerous holding tanks in the truck and/or trailer. I'm also going to replace the primary fuel filter for the engine with some kind of burlier filter (been looking at Racor). I'm only just now starting to learn about all this, but it's all pretty neat stuff. I'm using Radiant heat throughout the vehicle, so I'm going to plumb a loop to heat the fuel/oil-tanks. The goal is to be able to process and run reliably on just about anything. Whenever I start talking to people about this project, I feel like I have to tell them that I'm not an eco-nut. Hah.