I have researched it heavily, they seem to be the absolute best industry leaders.
I did a bunch of searching around. Narrowed it down to PAdiesel. Then I gave him a call. Super nice guy on the phone. Was glad to answer anything I asked. I plan on doing business with him this year. I believe using a centrifuge is the best & easiest way to get the oil it's cleanest. And yes, using heated oil is the way to do it.
I have never tried, but have been told, that ATF also makes good alternative fuel.
OR you could skip spending hours filtering fuel and just fill up at the pump
vastly less
not to mention, some of us have more time than money...every little bit helps.