Wouldn't many of the issues be fixed by heating the oil prior to burning it? On Xtreme 4x4 they put a vegetable oil kit on a truck they built. It came with a computer and a heated fuel tank that used engine coolant to bring the vegetable oil up to something like 170 degrees before it was run through the engine. It ran on regular diesel or biodiesel while the vegetable oil was warming up, then automatically switched over when it was ready.
I <3 Red Line oil