I used to be an operator in an oil refinery. Some of the crude we got in was nasty, really high parafin content. Loads we would get from another oilfield were so light and sweet you could just about burn it in a gas engine.
One of the design criteria of the multifuel engine was to be able to burn crude oil. It will do it and just fine. Maybe not forever, and not just any crude, but any light sweet crude will work in it just fine. You are going to go through more filters, well a lot more.
So it is really very subjective. How well it will work depends on the quality of the crude oil you get.
Another consideration is that the crude we got typically had a 2% water content. Dunno what you are going to do about that, but we would heat it up in a big tank and let the water settle out. One of the tank farm operator's jobs was to take care of that.
If I had good crude I wouldn't hesitate to burn it in a deuce. Just filter it good and go.