You all are confusing two different things.. The original poster talks about making biodiesel from WVO while some of you are discussing pouring cooking oil into your tanks.. VERY different things.
WVO - you can use it to power a diesel engine as long as it is filtered and heated to ~190F before burning. This requires coaxial heated fuel lines and a heated tank. You must start on regular diesel or biodiesel, switch to cooking oil, and then switch back to regular diesel to flush the lines of cooking oil before stopping the engine.
Biodiesel - fill your tank with it and go.. in your diesel engine. The flashpoint is too high, it will NOT burn in a water heater burner.. I have tried. I had some success lighting it off with diesel or kero and filling the tank with biodiesel, but it never really burned well and made alot of white smoke. Mixing kero and biodiesel worked better, but stunk pretty bad.
Ive designed automation systems for biodiesel processors before, and just stumbled on this thread while reading up on a new pressure washer for myself. I burn bioD in my diesels, but it has not served me well for burners. Ive also taken an old Kubota powered construction light tower and added a second fuel tank with a heat exchanger to run on WVO to use as a prime power generator for a biodiesel processor. It worked well in supplying the processor with both heat and electricity nearly for free. I would not run WVO in my new vehicle, the risk of coking on the injectors is far too great.
