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WVO works fine
I run waste vegetable oil through my 02 F350. I built a separator to dump my WVO into then it gets filtered into another tank.
As mentioned above you will plug filters when switching to Bio as it will clean out your fuel system. I've plugged a few filters using WVO until I learned how to use it properly.
I mix it about 30% Diesel and 70% WVO right in my truck. I use kerosene if it is cheaper, I then run 10% to 90% WVO. My cousin has a Duramax and has lots more trouble than I do. You really should heat your fuel, even if you are running straight Diesel. It just gives you a better burn and increases mileage. Don't go and buy an expensive fuel heater you can build one that works fine for about 20 bucks.
Any time you are running any kind of Bio fuel weather it be Biodiesel or WVO always monitor your engine oil. Fat or veggie oil under pressure and heat will turn into rubber. If you have an older engine with lots of blow by and you get oil in your crankcase you will have rubber forming in your oil.
Water injection or a hydrogen module will help running Bio or WVO as the steam will prevent buildup on your pistons. If you are getting high quality Biodiesel you should have a clean running truck without the steam.