There are a few good resources on cleaning WMO for use as a fuel, most of which are the sellers of centrifuge machines. The preparation protocol is: collection, settling period, heating, and centrifuging.
Using the above process (using moderate flow rates through the centrifuge) will clean contaminants and particulates to sub micron levels, posing absolutely zero work for the vehicles fuel filter.
The concern about noxious gasses created by combusting black oil is absolute bunk. Consider the nasty cocktail called gasoline: its burned by a gazillion motors in various states of repair condition and is concocted in a labratory to give it specific characteristics. If the person posting objections about the actions of others is concerned about health and affecting the environment, said person is speaking to the wrong crowd.
My recommendation would be to use no more than 50% black diesel to pump diesel on an older IDI diesel, and up to 10% on a newer IDI. There is no hard data to reference, so experimentation is necessary. I would refrain from feeding a modern, DI motor any WMO. Modern engines will be less tolerant to changes of viscosities, latent heat strengths and burn characteristics. Each motor and driving style will contribute to oil coking in the combustion chambers. A motor used for short trip driving will have a higher incidence for coking, and should be taken into account when deciding the porportioning of WMO to pump fuel.
Rick
. Ha ha. Just kidding. (Unless you want to...)
