running a Kia Pregio on 2/3 wvo mixed with 1/3 Diesel, no real conversion just an electric heater accross the injector lines and I turn the ignition on 3 times to heat the glow plugs before starting and that stops a smoky start up, I use to use petrol to mix but I think it was creating more issues because of the the return line heating the the fuel in the tank and I find petrol seems to become an issue, perhaps bubbling or something so i just found the mileage went down and the preformance went down, only seems to help during startup, so I would limit the amount of petrol in the mix, Im going to change my 2/3 wvo / 1/3 Diesel mix and try 15-20% Diesel/5% petrol/75% WVO. I think that be the perfect combo. But for me 2 tank system with switches and solenoids etc is too much. Single tank and just a single heater on the injector lines easier !!